diff --git a/tests/assembler/emitter_test_ecmascript.cpp b/tests/assembler/emitter_test_ecmascript.cpp
index e15a983e18d872dff5542c59c00431dd6bfa82c7..db8e18ddb8d03281ed1bffe05ed74c6f306ee92b 100644
--- a/tests/assembler/emitter_test_ecmascript.cpp
+++ b/tests/assembler/emitter_test_ecmascript.cpp
@@ -38,7 +38,9 @@
 
 namespace panda::test {
 
-using namespace panda::pandasm;
+using panda::pandasm::AsmEmitter;
+using panda::pandasm::Error;
+using panda::pandasm::Parser;
 
 static const uint8_t *GetTypeDescriptor(const std::string &name, std::string *storage)
 {
@@ -96,8 +98,8 @@ TEST(emittertests, ecmascript_debuginfo)
     panda_file::DebugInfoExtractor extractor(pf.get());
     auto methods = extractor.GetMethodIdList();
     ASSERT_EQ(methods.size(), 1);
-    auto line_table = extractor.GetLineNumberTable(methods[0]);
-    auto column_table = extractor.GetColumnNumberTable(methods[0]);
+    const auto &line_table = extractor.GetLineNumberTable(methods[0]);
+    const auto &column_table = extractor.GetColumnNumberTable(methods[0]);
 
     EXPECT_EQ(line_table.size(), 1);
     EXPECT_EQ(column_table.size(), 1);
diff --git a/tests/assembler/parser_test_ecmascript.cpp b/tests/assembler/parser_test_ecmascript.cpp
index d42dd2f1ca57b1e6e17f68e44003a4ce6e1b3f49..cb16db5799ad445b2266eefb48572add91d7a789 100644
--- a/tests/assembler/parser_test_ecmascript.cpp
+++ b/tests/assembler/parser_test_ecmascript.cpp
@@ -18,7 +18,8 @@
 #include <gtest/gtest.h>
 #include <string>
 
-using namespace panda::pandasm;
+using panda::pandasm::Error;
+using panda::pandasm::Parser;
 
 TEST(parsertests, calli_dyn_3args)
 {