diff --git a/ets2panda/compiler/lowering/ets/stringConstructorLowering.cpp b/ets2panda/compiler/lowering/ets/stringConstructorLowering.cpp
index 19429df0d398b643db4f3ef3cbe98c62a4bdd47d..7ae1908b9cd169d5ce4466b2344055bbfa1b1fb2 100644
--- a/ets2panda/compiler/lowering/ets/stringConstructorLowering.cpp
+++ b/ets2panda/compiler/lowering/ets/stringConstructorLowering.cpp
@@ -63,7 +63,7 @@ ir::Expression *ReplaceStringConstructor(public_lib::Context *const ctx,
         return arg;
     }
 
-    // Case for the constructor: new String(str: NullishType)
+    // Case for the constructor: new String(str: Object)
     if (newClassInstExpr->GetSignature()->InternalName() == Signatures::BUILTIN_STRING_FROM_NULLISH_CTOR) {
         auto *arg = newClassInstExpr->GetArguments()[0];
         auto *argType = arg->TsType();
diff --git a/ets2panda/declgen_ets2ts/declgenEts2Ts.cpp b/ets2panda/declgen_ets2ts/declgenEts2Ts.cpp
index e685df218f6891aecc7572668937e0e09e754313..f4ecb83328907c81d2a5e0744fe58a383ff5cb71 100644
--- a/ets2panda/declgen_ets2ts/declgenEts2Ts.cpp
+++ b/ets2panda/declgen_ets2ts/declgenEts2Ts.cpp
@@ -1675,7 +1675,7 @@ void TSDeclGen::ProcessETSTypeReference(const ir::TypeNode *typeAnnotation, cons
     if (ProcessTypeAnnotationSpecificTypes(checkerType)) {
         return;
     }
-    if (checkerType != nullptr && typeAnnotation->AsETSTypeReference()->Part()->GetIdent()->Name().Is("NullishType")) {
+    if (checkerType != nullptr && typeAnnotation->AsETSTypeReference()->Part()->GetIdent()->Name().Is("Any")) {
         OutDts(typeAnnotation->Parent()->IsTSArrayType() ? "(" : "");
         GenType(checkerType);
         OutDts(typeAnnotation->Parent()->IsTSArrayType() ? ")" : "");
diff --git a/ets2panda/linter/docs/rules-cn/recipe350.md b/ets2panda/linter/docs/rules-cn/recipe350.md
index f28e758abddae553171cddcb30855d1e2ac177a5..64a870d23a15172742f97cce8f67afe1a8af5852 100644
--- a/ets2panda/linter/docs/rules-cn/recipe350.md
+++ b/ets2panda/linter/docs/rules-cn/recipe350.md
@@ -49,7 +49,7 @@ let baseInstance: BaseClass = new BaseClass();
 let array = new Array<BaseClass>();
 array.push(baseInstance);
 let task = new taskpool.Task(testFunc, array);
-taskpool.execute(task).then((res: NullishType):void => {
+taskpool.execute(task).then((res: Any):void => {
   console.info('task res is: ' + res)
 });
 ```
diff --git a/ets2panda/linter/docs/rules-cn/recipe351.md b/ets2panda/linter/docs/rules-cn/recipe351.md
index bd95ad170bf09a2c8c853d24a2d72d2666db1e8f..469e1adc16a9622efd1147d6dc7e079449582d01 100644
--- a/ets2panda/linter/docs/rules-cn/recipe351.md
+++ b/ets2panda/linter/docs/rules-cn/recipe351.md
@@ -56,7 +56,7 @@ let buffer1: ArrayBuffer = new ArrayBuffer(16);
 let view1: Uint8Array = new Uint8Array(buffer1);
 
 let task: taskpool.Task = new taskpool.Task(testTransfer, view, view1);
-taskpool.execute(task).then((res: NullishType):void => {
+taskpool.execute(task).then((res: Any):void => {
   console.info('test result: ' + res);
 }).catch((e: Error): void => {
   console.error('test catch: ' + e);
diff --git a/ets2panda/test/ast/parser/ets/unreachable_fuzz_error.ets b/ets2panda/test/ast/parser/ets/unreachable_fuzz_error.ets
index 1b3e35abc03eff8a6367a730582018ae972dd5f8..81b8aca00ec4a458b1f2dd162afd4ad6882428f0 100644
--- a/ets2panda/test/ast/parser/ets/unreachable_fuzz_error.ets
+++ b/ets2panda/test/ast/parser/ets/unreachable_fuzz_error.ets
@@ -19,14 +19,14 @@
         arktest.assert(y[0] == 1)
         arktest.assert(y[1] == 2)
     
-classtext: string, reviver: ((key: string, value: NullishType) => NullishType) | undefined, type: Type
+classtext: string, reviver: ((key: string, value: Any) => Any) | undefined, type: Type
 
 /* @@? 16:13 Error TypeError: Unresolved reference z */
 /* @@? 22:12 Error SyntaxError: Label must be followed by a loop statement. */
 /* @@? 22:18 Error SyntaxError: Unexpected token ','. */
 /* @@? 22:20 Error SyntaxError: Unexpected token 'reviver'. */
 /* @@? 22:29 Error SyntaxError: Label must be followed by a loop statement. */
-/* @@? 22:91 Error SyntaxError: Unexpected token ','. */
-/* @@? 22:93 Error SyntaxError: Unexpected token 'type'. */
-/* @@? 22:99 Error SyntaxError: Label must be followed by a loop statement. */
+/* @@? 22:75 Error SyntaxError: Unexpected token ','. */
+/* @@? 22:77 Error SyntaxError: Unexpected token 'type'. */
+/* @@? 22:83 Error SyntaxError: Label must be followed by a loop statement. */
 /* @@? 33:1 Error SyntaxError: Expected '}', got 'end of stream'. */
diff --git a/ets2panda/test/compiler/ets/generic_override_2-expected.txt b/ets2panda/test/compiler/ets/generic_override_2-expected.txt
index e95c91f1a869f7801276f492c4b95b09c955b6ea..c17c377b4e4fc6cabfd25f4047594b62cc48b661 100644
--- a/ets2panda/test/compiler/ets/generic_override_2-expected.txt
+++ b/ets2panda/test/compiler/ets/generic_override_2-expected.txt
@@ -369,7 +369,7 @@
                                   "type": "ETSTypeReferencePart",
                                   "name": {
                                     "type": "Identifier",
-                                    "name": "NullishType",
+                                    "name": "Any",
                                     "loc": {
                                       "start": {
                                         "line": 18,
@@ -378,7 +378,7 @@
                                       },
                                       "end": {
                                         "line": 18,
-                                        "column": 45,
+                                        "column": 37,
                                         "program": "generic_override_2.ets"
                                       }
                                     }
@@ -391,7 +391,7 @@
                                     },
                                     "end": {
                                       "line": 18,
-                                      "column": 45,
+                                      "column": 37,
                                       "program": "generic_override_2.ets"
                                     }
                                   }
@@ -404,7 +404,7 @@
                                   },
                                   "end": {
                                     "line": 18,
-                                    "column": 45,
+                                    "column": 37,
                                     "program": "generic_override_2.ets"
                                   }
                                 }
@@ -417,7 +417,7 @@
                                 },
                                 "end": {
                                   "line": 18,
-                                  "column": 45,
+                                  "column": 37,
                                   "program": "generic_override_2.ets"
                                 }
                               }
@@ -430,7 +430,7 @@
                               },
                               "end": {
                                 "line": 18,
-                                "column": 45,
+                                "column": 37,
                                 "program": "generic_override_2.ets"
                               }
                             }
@@ -449,12 +449,12 @@
                                   "loc": {
                                     "start": {
                                       "line": 18,
-                                      "column": 50,
+                                      "column": 42,
                                       "program": "generic_override_2.ets"
                                     },
                                     "end": {
                                       "line": 18,
-                                      "column": 51,
+                                      "column": 43,
                                       "program": "generic_override_2.ets"
                                     }
                                   }
@@ -462,12 +462,12 @@
                                 "loc": {
                                   "start": {
                                     "line": 18,
-                                    "column": 50,
+                                    "column": 42,
                                     "program": "generic_override_2.ets"
                                   },
                                   "end": {
                                     "line": 18,
-                                    "column": 51,
+                                    "column": 43,
                                     "program": "generic_override_2.ets"
                                   }
                                 }
@@ -475,12 +475,12 @@
                               "loc": {
                                 "start": {
                                   "line": 18,
-                                  "column": 50,
+                                  "column": 42,
                                   "program": "generic_override_2.ets"
                                 },
                                 "end": {
                                   "line": 18,
-                                  "column": 51,
+                                  "column": 43,
                                   "program": "generic_override_2.ets"
                                 }
                               }
@@ -495,12 +495,12 @@
                                   "loc": {
                                     "start": {
                                       "line": 18,
-                                      "column": 52,
+                                      "column": 44,
                                       "program": "generic_override_2.ets"
                                     },
                                     "end": {
                                       "line": 18,
-                                      "column": 54,
+                                      "column": 46,
                                       "program": "generic_override_2.ets"
                                     }
                                   }
@@ -518,12 +518,12 @@
                                           "loc": {
                                             "start": {
                                               "line": 18,
-                                              "column": 55,
+                                              "column": 47,
                                               "program": "generic_override_2.ets"
                                             },
                                             "end": {
                                               "line": 18,
-                                              "column": 56,
+                                              "column": 48,
                                               "program": "generic_override_2.ets"
                                             }
                                           }
@@ -531,12 +531,12 @@
                                         "loc": {
                                           "start": {
                                             "line": 18,
-                                            "column": 55,
+                                            "column": 47,
                                             "program": "generic_override_2.ets"
                                           },
                                           "end": {
                                             "line": 18,
-                                            "column": 56,
+                                            "column": 48,
                                             "program": "generic_override_2.ets"
                                           }
                                         }
@@ -544,12 +544,12 @@
                                       "loc": {
                                         "start": {
                                           "line": 18,
-                                          "column": 55,
+                                          "column": 47,
                                           "program": "generic_override_2.ets"
                                         },
                                         "end": {
                                           "line": 18,
-                                          "column": 56,
+                                          "column": 48,
                                           "program": "generic_override_2.ets"
                                         }
                                       }
@@ -558,12 +558,12 @@
                                   "loc": {
                                     "start": {
                                       "line": 18,
-                                      "column": 54,
+                                      "column": 46,
                                       "program": "generic_override_2.ets"
                                     },
                                     "end": {
                                       "line": 18,
-                                      "column": 57,
+                                      "column": 49,
                                       "program": "generic_override_2.ets"
                                     }
                                   }
@@ -571,12 +571,12 @@
                                 "loc": {
                                   "start": {
                                     "line": 18,
-                                    "column": 52,
+                                    "column": 44,
                                     "program": "generic_override_2.ets"
                                   },
                                   "end": {
                                     "line": 18,
-                                    "column": 57,
+                                    "column": 49,
                                     "program": "generic_override_2.ets"
                                   }
                                 }
@@ -584,12 +584,12 @@
                               "loc": {
                                 "start": {
                                   "line": 18,
-                                  "column": 52,
+                                  "column": 44,
                                   "program": "generic_override_2.ets"
                                 },
                                 "end": {
                                   "line": 18,
-                                  "column": 57,
+                                  "column": 49,
                                   "program": "generic_override_2.ets"
                                 }
                               }
@@ -598,12 +598,12 @@
                           "loc": {
                             "start": {
                               "line": 18,
-                              "column": 50,
+                              "column": 42,
                               "program": "generic_override_2.ets"
                             },
                             "end": {
                               "line": 18,
-                              "column": 57,
+                              "column": 49,
                               "program": "generic_override_2.ets"
                             }
                           }
@@ -616,7 +616,7 @@
                           },
                           "end": {
                             "line": 18,
-                            "column": 57,
+                            "column": 49,
                             "program": "generic_override_2.ets"
                           }
                         }
@@ -629,7 +629,7 @@
                         },
                         "end": {
                           "line": 18,
-                          "column": 57,
+                          "column": 49,
                           "program": "generic_override_2.ets"
                         }
                       }
@@ -642,7 +642,7 @@
                       },
                       "end": {
                         "line": 18,
-                        "column": 57,
+                        "column": 49,
                         "program": "generic_override_2.ets"
                       }
                     }
@@ -658,12 +658,12 @@
                       "loc": {
                         "start": {
                           "line": 18,
-                          "column": 60,
+                          "column": 52,
                           "program": "generic_override_2.ets"
                         },
                         "end": {
                           "line": 18,
-                          "column": 62,
+                          "column": 54,
                           "program": "generic_override_2.ets"
                         }
                       }
@@ -684,12 +684,12 @@
                                   "loc": {
                                     "start": {
                                       "line": 18,
-                                      "column": 63,
+                                      "column": 55,
                                       "program": "generic_override_2.ets"
                                     },
                                     "end": {
                                       "line": 18,
-                                      "column": 64,
+                                      "column": 56,
                                       "program": "generic_override_2.ets"
                                     }
                                   }
@@ -697,12 +697,12 @@
                                 "loc": {
                                   "start": {
                                     "line": 18,
-                                    "column": 63,
+                                    "column": 55,
                                     "program": "generic_override_2.ets"
                                   },
                                   "end": {
                                     "line": 18,
-                                    "column": 64,
+                                    "column": 56,
                                     "program": "generic_override_2.ets"
                                   }
                                 }
@@ -710,12 +710,12 @@
                               "loc": {
                                 "start": {
                                   "line": 18,
-                                  "column": 63,
+                                  "column": 55,
                                   "program": "generic_override_2.ets"
                                 },
                                 "end": {
                                   "line": 18,
-                                  "column": 64,
+                                  "column": 56,
                                   "program": "generic_override_2.ets"
                                 }
                               }
@@ -730,12 +730,12 @@
                                   "loc": {
                                     "start": {
                                       "line": 18,
-                                      "column": 65,
+                                      "column": 57,
                                       "program": "generic_override_2.ets"
                                     },
                                     "end": {
                                       "line": 18,
-                                      "column": 66,
+                                      "column": 58,
                                       "program": "generic_override_2.ets"
                                     }
                                   }
@@ -743,12 +743,12 @@
                                 "loc": {
                                   "start": {
                                     "line": 18,
-                                    "column": 65,
+                                    "column": 57,
                                     "program": "generic_override_2.ets"
                                   },
                                   "end": {
                                     "line": 18,
-                                    "column": 66,
+                                    "column": 58,
                                     "program": "generic_override_2.ets"
                                   }
                                 }
@@ -756,12 +756,12 @@
                               "loc": {
                                 "start": {
                                   "line": 18,
-                                  "column": 65,
+                                  "column": 57,
                                   "program": "generic_override_2.ets"
                                 },
                                 "end": {
                                   "line": 18,
-                                  "column": 66,
+                                  "column": 58,
                                   "program": "generic_override_2.ets"
                                 }
                               }
@@ -770,12 +770,12 @@
                           "loc": {
                             "start": {
                               "line": 18,
-                              "column": 63,
+                              "column": 55,
                               "program": "generic_override_2.ets"
                             },
                             "end": {
                               "line": 18,
-                              "column": 66,
+                              "column": 58,
                               "program": "generic_override_2.ets"
                             }
                           }
@@ -784,12 +784,12 @@
                       "loc": {
                         "start": {
                           "line": 18,
-                          "column": 62,
+                          "column": 54,
                           "program": "generic_override_2.ets"
                         },
                         "end": {
                           "line": 18,
-                          "column": 67,
+                          "column": 59,
                           "program": "generic_override_2.ets"
                         }
                       }
@@ -797,12 +797,12 @@
                     "loc": {
                       "start": {
                         "line": 18,
-                        "column": 60,
+                        "column": 52,
                         "program": "generic_override_2.ets"
                       },
                       "end": {
                         "line": 18,
-                        "column": 67,
+                        "column": 59,
                         "program": "generic_override_2.ets"
                       }
                     }
@@ -810,12 +810,12 @@
                   "loc": {
                     "start": {
                       "line": 18,
-                      "column": 60,
+                      "column": 52,
                       "program": "generic_override_2.ets"
                     },
                     "end": {
                       "line": 18,
-                      "column": 67,
+                      "column": 59,
                       "program": "generic_override_2.ets"
                     }
                   }
@@ -964,7 +964,7 @@
                               },
                               "end": {
                                 "line": 18,
-                                "column": 67,
+                                "column": 59,
                                 "program": "generic_override_2.ets"
                               }
                             }
@@ -980,7 +980,7 @@
                               },
                               "end": {
                                 "line": 18,
-                                "column": 67,
+                                "column": 59,
                                 "program": "generic_override_2.ets"
                               }
                             }
@@ -993,7 +993,7 @@
                             },
                             "end": {
                               "line": 18,
-                              "column": 67,
+                              "column": 59,
                               "program": "generic_override_2.ets"
                             }
                           }
@@ -1006,7 +1006,7 @@
                           },
                           "end": {
                             "line": 18,
-                            "column": 67,
+                            "column": 59,
                             "program": "generic_override_2.ets"
                           }
                         }
@@ -1019,7 +1019,7 @@
                         },
                         "end": {
                           "line": 18,
-                          "column": 67,
+                          "column": 59,
                           "program": "generic_override_2.ets"
                         }
                       }
@@ -1038,7 +1038,7 @@
                             },
                             "end": {
                               "line": 18,
-                              "column": 67,
+                              "column": 59,
                               "program": "generic_override_2.ets"
                             }
                           }
@@ -1054,7 +1054,7 @@
                             },
                             "end": {
                               "line": 18,
-                              "column": 67,
+                              "column": 59,
                               "program": "generic_override_2.ets"
                             }
                           }
@@ -1073,7 +1073,7 @@
                           },
                           "end": {
                             "line": 18,
-                            "column": 67,
+                            "column": 59,
                             "program": "generic_override_2.ets"
                           }
                         }
@@ -1087,7 +1087,7 @@
                       },
                       "end": {
                         "line": 18,
-                        "column": 67,
+                        "column": 59,
                         "program": "generic_override_2.ets"
                       }
                     }
@@ -1101,7 +1101,7 @@
                   },
                   "end": {
                     "line": 18,
-                    "column": 67,
+                    "column": 59,
                     "program": "generic_override_2.ets"
                   }
                 }
@@ -1114,7 +1114,7 @@
                 },
                 "end": {
                   "line": 18,
-                  "column": 67,
+                  "column": 59,
                   "program": "generic_override_2.ets"
                 }
               }
@@ -1128,7 +1128,7 @@
               },
               "end": {
                 "line": 18,
-                "column": 68,
+                "column": 60,
                 "program": "generic_override_2.ets"
               }
             }
@@ -1783,7 +1783,7 @@
                                   "type": "ETSTypeReferencePart",
                                   "name": {
                                     "type": "Identifier",
-                                    "name": "NullishType",
+                                    "name": "Any",
                                     "loc": {
                                       "start": {
                                         "line": 23,
@@ -1792,7 +1792,7 @@
                                       },
                                       "end": {
                                         "line": 23,
-                                        "column": 45,
+                                        "column": 37,
                                         "program": "generic_override_2.ets"
                                       }
                                     }
@@ -1805,7 +1805,7 @@
                                     },
                                     "end": {
                                       "line": 23,
-                                      "column": 45,
+                                      "column": 37,
                                       "program": "generic_override_2.ets"
                                     }
                                   }
@@ -1818,7 +1818,7 @@
                                   },
                                   "end": {
                                     "line": 23,
-                                    "column": 45,
+                                    "column": 37,
                                     "program": "generic_override_2.ets"
                                   }
                                 }
@@ -1831,7 +1831,7 @@
                                 },
                                 "end": {
                                   "line": 23,
-                                  "column": 45,
+                                  "column": 37,
                                   "program": "generic_override_2.ets"
                                 }
                               }
@@ -1844,7 +1844,7 @@
                               },
                               "end": {
                                 "line": 23,
-                                "column": 45,
+                                "column": 37,
                                 "program": "generic_override_2.ets"
                               }
                             }
@@ -1863,12 +1863,12 @@
                                   "loc": {
                                     "start": {
                                       "line": 23,
-                                      "column": 50,
+                                      "column": 42,
                                       "program": "generic_override_2.ets"
                                     },
                                     "end": {
                                       "line": 23,
-                                      "column": 51,
+                                      "column": 43,
                                       "program": "generic_override_2.ets"
                                     }
                                   }
@@ -1876,12 +1876,12 @@
                                 "loc": {
                                   "start": {
                                     "line": 23,
-                                    "column": 50,
+                                    "column": 42,
                                     "program": "generic_override_2.ets"
                                   },
                                   "end": {
                                     "line": 23,
-                                    "column": 51,
+                                    "column": 43,
                                     "program": "generic_override_2.ets"
                                   }
                                 }
@@ -1889,12 +1889,12 @@
                               "loc": {
                                 "start": {
                                   "line": 23,
-                                  "column": 50,
+                                  "column": 42,
                                   "program": "generic_override_2.ets"
                                 },
                                 "end": {
                                   "line": 23,
-                                  "column": 51,
+                                  "column": 43,
                                   "program": "generic_override_2.ets"
                                 }
                               }
@@ -1909,12 +1909,12 @@
                                   "loc": {
                                     "start": {
                                       "line": 23,
-                                      "column": 52,
+                                      "column": 44,
                                       "program": "generic_override_2.ets"
                                     },
                                     "end": {
                                       "line": 23,
-                                      "column": 54,
+                                      "column": 46,
                                       "program": "generic_override_2.ets"
                                     }
                                   }
@@ -1932,12 +1932,12 @@
                                           "loc": {
                                             "start": {
                                               "line": 23,
-                                              "column": 55,
+                                              "column": 47,
                                               "program": "generic_override_2.ets"
                                             },
                                             "end": {
                                               "line": 23,
-                                              "column": 56,
+                                              "column": 48,
                                               "program": "generic_override_2.ets"
                                             }
                                           }
@@ -1945,12 +1945,12 @@
                                         "loc": {
                                           "start": {
                                             "line": 23,
-                                            "column": 55,
+                                            "column": 47,
                                             "program": "generic_override_2.ets"
                                           },
                                           "end": {
                                             "line": 23,
-                                            "column": 56,
+                                            "column": 48,
                                             "program": "generic_override_2.ets"
                                           }
                                         }
@@ -1958,12 +1958,12 @@
                                       "loc": {
                                         "start": {
                                           "line": 23,
-                                          "column": 55,
+                                          "column": 47,
                                           "program": "generic_override_2.ets"
                                         },
                                         "end": {
                                           "line": 23,
-                                          "column": 56,
+                                          "column": 48,
                                           "program": "generic_override_2.ets"
                                         }
                                       }
@@ -1972,12 +1972,12 @@
                                   "loc": {
                                     "start": {
                                       "line": 23,
-                                      "column": 54,
+                                      "column": 46,
                                       "program": "generic_override_2.ets"
                                     },
                                     "end": {
                                       "line": 23,
-                                      "column": 57,
+                                      "column": 49,
                                       "program": "generic_override_2.ets"
                                     }
                                   }
@@ -1985,12 +1985,12 @@
                                 "loc": {
                                   "start": {
                                     "line": 23,
-                                    "column": 52,
+                                    "column": 44,
                                     "program": "generic_override_2.ets"
                                   },
                                   "end": {
                                     "line": 23,
-                                    "column": 57,
+                                    "column": 49,
                                     "program": "generic_override_2.ets"
                                   }
                                 }
@@ -1998,12 +1998,12 @@
                               "loc": {
                                 "start": {
                                   "line": 23,
-                                  "column": 52,
+                                  "column": 44,
                                   "program": "generic_override_2.ets"
                                 },
                                 "end": {
                                   "line": 23,
-                                  "column": 57,
+                                  "column": 49,
                                   "program": "generic_override_2.ets"
                                 }
                               }
@@ -2012,12 +2012,12 @@
                           "loc": {
                             "start": {
                               "line": 23,
-                              "column": 50,
+                              "column": 42,
                               "program": "generic_override_2.ets"
                             },
                             "end": {
                               "line": 23,
-                              "column": 57,
+                              "column": 49,
                               "program": "generic_override_2.ets"
                             }
                           }
@@ -2030,7 +2030,7 @@
                           },
                           "end": {
                             "line": 23,
-                            "column": 57,
+                            "column": 49,
                             "program": "generic_override_2.ets"
                           }
                         }
@@ -2043,7 +2043,7 @@
                         },
                         "end": {
                           "line": 23,
-                          "column": 57,
+                          "column": 49,
                           "program": "generic_override_2.ets"
                         }
                       }
@@ -2056,7 +2056,7 @@
                       },
                       "end": {
                         "line": 23,
-                        "column": 57,
+                        "column": 49,
                         "program": "generic_override_2.ets"
                       }
                     }
@@ -2072,12 +2072,12 @@
                       "loc": {
                         "start": {
                           "line": 23,
-                          "column": 60,
+                          "column": 52,
                           "program": "generic_override_2.ets"
                         },
                         "end": {
                           "line": 23,
-                          "column": 62,
+                          "column": 54,
                           "program": "generic_override_2.ets"
                         }
                       }
@@ -2098,12 +2098,12 @@
                                   "loc": {
                                     "start": {
                                       "line": 23,
-                                      "column": 63,
+                                      "column": 55,
                                       "program": "generic_override_2.ets"
                                     },
                                     "end": {
                                       "line": 23,
-                                      "column": 64,
+                                      "column": 56,
                                       "program": "generic_override_2.ets"
                                     }
                                   }
@@ -2111,12 +2111,12 @@
                                 "loc": {
                                   "start": {
                                     "line": 23,
-                                    "column": 63,
+                                    "column": 55,
                                     "program": "generic_override_2.ets"
                                   },
                                   "end": {
                                     "line": 23,
-                                    "column": 64,
+                                    "column": 56,
                                     "program": "generic_override_2.ets"
                                   }
                                 }
@@ -2124,12 +2124,12 @@
                               "loc": {
                                 "start": {
                                   "line": 23,
-                                  "column": 63,
+                                  "column": 55,
                                   "program": "generic_override_2.ets"
                                 },
                                 "end": {
                                   "line": 23,
-                                  "column": 64,
+                                  "column": 56,
                                   "program": "generic_override_2.ets"
                                 }
                               }
@@ -2144,12 +2144,12 @@
                                   "loc": {
                                     "start": {
                                       "line": 23,
-                                      "column": 65,
+                                      "column": 57,
                                       "program": "generic_override_2.ets"
                                     },
                                     "end": {
                                       "line": 23,
-                                      "column": 66,
+                                      "column": 58,
                                       "program": "generic_override_2.ets"
                                     }
                                   }
@@ -2157,12 +2157,12 @@
                                 "loc": {
                                   "start": {
                                     "line": 23,
-                                    "column": 65,
+                                    "column": 57,
                                     "program": "generic_override_2.ets"
                                   },
                                   "end": {
                                     "line": 23,
-                                    "column": 66,
+                                    "column": 58,
                                     "program": "generic_override_2.ets"
                                   }
                                 }
@@ -2170,12 +2170,12 @@
                               "loc": {
                                 "start": {
                                   "line": 23,
-                                  "column": 65,
+                                  "column": 57,
                                   "program": "generic_override_2.ets"
                                 },
                                 "end": {
                                   "line": 23,
-                                  "column": 66,
+                                  "column": 58,
                                   "program": "generic_override_2.ets"
                                 }
                               }
@@ -2184,12 +2184,12 @@
                           "loc": {
                             "start": {
                               "line": 23,
-                              "column": 63,
+                              "column": 55,
                               "program": "generic_override_2.ets"
                             },
                             "end": {
                               "line": 23,
-                              "column": 66,
+                              "column": 58,
                               "program": "generic_override_2.ets"
                             }
                           }
@@ -2198,12 +2198,12 @@
                       "loc": {
                         "start": {
                           "line": 23,
-                          "column": 62,
+                          "column": 54,
                           "program": "generic_override_2.ets"
                         },
                         "end": {
                           "line": 23,
-                          "column": 67,
+                          "column": 59,
                           "program": "generic_override_2.ets"
                         }
                       }
@@ -2211,12 +2211,12 @@
                     "loc": {
                       "start": {
                         "line": 23,
-                        "column": 60,
+                        "column": 52,
                         "program": "generic_override_2.ets"
                       },
                       "end": {
                         "line": 23,
-                        "column": 67,
+                        "column": 59,
                         "program": "generic_override_2.ets"
                       }
                     }
@@ -2224,12 +2224,12 @@
                   "loc": {
                     "start": {
                       "line": 23,
-                      "column": 60,
+                      "column": 52,
                       "program": "generic_override_2.ets"
                     },
                     "end": {
                       "line": 23,
-                      "column": 67,
+                      "column": 59,
                       "program": "generic_override_2.ets"
                     }
                   }
@@ -2569,7 +2569,7 @@
                   "loc": {
                     "start": {
                       "line": 23,
-                      "column": 68,
+                      "column": 60,
                       "program": "generic_override_2.ets"
                     },
                     "end": {
diff --git a/ets2panda/test/compiler/ets/generic_override_2.ets b/ets2panda/test/compiler/ets/generic_override_2.ets
index b574f303442d8feac63bbe97fa66206b04a51863..50f06a3aba6a530a5533335551cfd5f2396ed70c 100644
--- a/ets2panda/test/compiler/ets/generic_override_2.ets
+++ b/ets2panda/test/compiler/ets/generic_override_2.ets
@@ -15,12 +15,12 @@
 
 interface PL<T> {
     then<U, E = never>(onFulfilled?: (value: T) => U|PL<U>,
-            onRejected?: (error: NullishType) => E|PL<E>): PL<U|E>;
+            onRejected?: (error: Any) => E|PL<E>): PL<U|E>;
 }
 
 class P<T> implements PL<T> {
     then<U, E = never>(onFulfilled?: (value: T) => U|PL<U>,
-            onRejected?: (error: NullishType) => E|PL<E>): PL<U|E> {
+            onRejected?: (error: Any) => E|PL<E>): PL<U|E> {
         return new P<U|E>()
     }
 }
diff --git a/ets2panda/test/runtime/ets/invoke-with-rest.ets b/ets2panda/test/runtime/ets/invoke-with-rest.ets
index 714765bd1ae1f75108d6413855088773e3650b26..db6bc82f1b00bbb390ecc4e11cfe4b8f4a930635 100644
--- a/ets2panda/test/runtime/ets/invoke-with-rest.ets
+++ b/ets2panda/test/runtime/ets/invoke-with-rest.ets
@@ -14,10 +14,10 @@
  */
 
 class A<T> {
-    x: FixedArray<NullishType>
+    x: FixedArray<Any>
     constructor(x: T) {
-        this.x = new NullishType[1]
-        this.x[0] = x as NullishType
+        this.x = new Any[1]
+        this.x[0] = x as Any
     }
 
     static $_invoke<T>(first: T, ...items: T[]): A<T> {
diff --git a/ets2panda/test/runtime/ets/string_from_nullish.ets b/ets2panda/test/runtime/ets/string_from_any.ets
similarity index 97%
rename from ets2panda/test/runtime/ets/string_from_nullish.ets
rename to ets2panda/test/runtime/ets/string_from_any.ets
index e65aa7f70c783a5b389e272f4462939cf308942e..5382086b6865ce7239b109d39fbb3892bc3ddfdc 100644
--- a/ets2panda/test/runtime/ets/string_from_nullish.ets
+++ b/ets2panda/test/runtime/ets/string_from_any.ets
@@ -14,7 +14,7 @@
  */
 
 function main(): int {
-   let z: NullishType = new Number(1);
+   let z: Any = new Number(1);
    let z1 = undefined;
    let z2 = null;
    let z3: Object = new String("0");