diff --git a/services/audiomanager/test/unittest/managersink/src/daudio_sink_dev_test.cpp b/services/audiomanager/test/unittest/managersink/src/daudio_sink_dev_test.cpp
index c15854ec0ab29f910d749d0c69a1c3de0354cf83..02915f299dbb20880ba4839fd19f1c9fa0651892 100644
--- a/services/audiomanager/test/unittest/managersink/src/daudio_sink_dev_test.cpp
+++ b/services/audiomanager/test/unittest/managersink/src/daudio_sink_dev_test.cpp
@@ -126,6 +126,18 @@ HWTEST_F(DAudioSinkDevTest, TaskCloseDSpeaker_002, TestSize.Level1)
     EXPECT_EQ(DH_SUCCESS, sinkDev_->TaskCloseDSpeaker(args));
 }
 
+/**
+ * @tc.name: TaskCloseDSpeaker_003
+ * @tc.desc: Verify the TaskCloseDSpeaker function.
+ * @tc.type: FUNC
+ * @tc.require: AR000H0E5F
+ */
+HWTEST_F(DAudioSinkDevTest, TaskCloseDSpeaker_003, TestSize.Level1)
+{
+    std::string args;
+    EXPECT_EQ(ERR_DH_AUDIO_FAILED, sinkDev_->TaskCloseDSpeaker(args));
+}
+
 /**
  * @tc.name: TaskStartRender_001
  * @tc.desc: Verify the TaskStartRender function.
@@ -143,6 +155,18 @@ HWTEST_F(DAudioSinkDevTest, TaskStartRender_001, TestSize.Level1)
     EXPECT_NE(DH_SUCCESS, sinkDev_->TaskStartRender(args));
 }
 
+/**
+ * @tc.name: TaskStartRender_002
+ * @tc.desc: Verify the TaskStartRender function.
+ * @tc.type: FUNC
+ * @tc.require: AR000H0E5F
+ */
+HWTEST_F(DAudioSinkDevTest, TaskStartRender_002, TestSize.Level1)
+{
+    std::string args;
+    EXPECT_EQ(ERR_DH_AUDIO_FAILED, sinkDev_->TaskStartRender(args));
+}
+
 /**
  * @tc.name: TaskOpenDMic_001
  * @tc.desc: Verify the TaskOpenDMic function.
@@ -194,6 +218,18 @@ HWTEST_F(DAudioSinkDevTest, TaskCloseDMic_002, TestSize.Level1)
     EXPECT_EQ(DH_SUCCESS, sinkDev_->TaskCloseDMic(args));
 }
 
+/**
+ * @tc.name: TaskCloseDMic_003
+ * @tc.desc: Verify the TaskCloseDMic function.
+ * @tc.type: FUNC
+ * @tc.require: AR000H0E5F
+ */
+HWTEST_F(DAudioSinkDevTest, TaskCloseDMic_003, TestSize.Level1)
+{
+    std::string args = "{\"dhId\":\"123\"}";
+    EXPECT_EQ(DH_SUCCESS, sinkDev_->TaskCloseDMic(args));
+}
+
 /**
  * @tc.name: TaskSetParameter_001
  * @tc.desc: Verify the TaskSetParameter function.
@@ -221,6 +257,22 @@ HWTEST_F(DAudioSinkDevTest, TaskSetParameter_002, TestSize.Level1)
     EXPECT_NE(DH_SUCCESS, sinkDev_->TaskSetParameter(args));
 }
 
+/**
+ * @tc.name: TaskSetParameter_003
+ * @tc.desc: Verify the TaskSetParameter function.
+ * @tc.type: FUNC
+ * @tc.require: AR000H0E5F
+ */
+HWTEST_F(DAudioSinkDevTest, TaskSetParameter_003, TestSize.Level1)
+{
+    std::string args = "{\"dhId\":\"123\"}";
+    std::string devId;
+    int32_t dhId = 1;
+    sinkDev_->micClient_ = nullptr;
+    sinkDev_->speakerClient_ = std::make_shared<DSpeakerClient>(devId, dhId, sinkDev_);
+    EXPECT_EQ(ERR_DH_AUDIO_NULLPTR, sinkDev_->TaskSetParameter(args));
+}
+
 /**
  * @tc.name: TaskSetVolume_001
  * @tc.desc: Verify the TaskSetVolume function.
@@ -376,5 +428,17 @@ HWTEST_F(DAudioSinkDevTest, SendAudioEventToRemote_002, TestSize.Level1)
     sinkDev_->speakerClient_ = std::make_shared<DSpeakerClient>(devId, dhId, sinkDev_);
     EXPECT_EQ(ERR_DH_AUDIO_NULLPTR, sinkDev_->SendAudioEventToRemote(event));
 }
+
+/**
+ * @tc.name: ConvertString2Int_001
+ * @tc.desc: Verify the ConvertString2Int function.
+ * @tc.type: FUNC
+ * @tc.require: AR000H0E5F
+ */
+HWTEST_F(DAudioSinkDevTest, ConvertString2Int_001, TestSize.Level1)
+{
+   std::string val;
+   EXPECT_EQ(-1, sinkDev_->ConvertString2Int(val));
+}
 } // DistributedHardware
 } // OHOS