diff --git a/services/audio_service/test/unittest/format_converter_unit_test.cpp b/services/audio_service/test/unittest/format_converter_unit_test.cpp
index bcf1ea787ba50c6efb4c3dc33d4d93e4e2e79d51..33eb9386dd734cc76c4185a8f3d2706bb740a428 100644
--- a/services/audio_service/test/unittest/format_converter_unit_test.cpp
+++ b/services/audio_service/test/unittest/format_converter_unit_test.cpp
@@ -267,48 +267,13 @@ HWTEST_F(FormatConverterUnitTest, S16MonoToS16Stereo_002, TestSize.Level1)
     EXPECT_EQ(ret, -1);
 }
 
-/**
- * @tc.name  : Test FormatConverter API
- * @tc.type  : FUNC
- * @tc.number: S16MonoToS16Stereo_003
- * @tc.desc  : Test FormatConverter interface.
- */
-HWTEST_F(FormatConverterUnitTest, S16MonoToS16Stereo_003, TestSize.Level1)
-{
-    BufferDesc srcDesc;
-    BufferDesc dstDesc;
-    int32_t ret = -1;
-    uint8_t srcBuffer[8] = {0};
-    uint8_t dstBuffer[4] = {0};
-
-    dstDesc.bufLength = 4;
-    srcDesc.buffer = srcBuffer;
-    srcDesc.bufLength = 8;
-    dstDesc.buffer = dstBuffer;
-
-    ret = FormatConverter::S16MonoToS16Stereo(srcDesc, dstDesc);
-    EXPECT_EQ(ret, 0);
-
-    ret = FormatConverter::S16StereoToS32Stereo(srcDesc, dstDesc);
-    EXPECT_EQ(ret, 0);
-
-    ret = FormatConverter::S32MonoToS32Stereo(srcDesc, dstDesc);
-    EXPECT_EQ(ret, 0);
-
-    ret = FormatConverter::F32MonoToS32Stereo(srcDesc, dstDesc);
-    EXPECT_EQ(ret, 0);
-
-    ret = FormatConverter::S16StereoToF32Stereo(srcDesc, dstDesc);
-    EXPECT_EQ(ret, 0);
-}
-
 /**
  * @tc.name  : Test FormatConverter API
  * @tc.type  : FUNC
  * @tc.number: S16MonoToS16Stereo_004
  * @tc.desc  : Test FormatConverter interface.
  */
-HWTEST_F(FormatConverterUnitTest, S16MonoToS16Stereo_004, TestSize.Level1)
+HWTEST_F(FormatConverterUnitTest, S16MonoToS16Stereo_003, TestSize.Level1)
 {
     BufferDesc srcDesc;
     BufferDesc dstDesc;