diff --git a/modules/audio_processing/test/py_quality_assessment/quality_assessment/annotations.py b/modules/audio_processing/test/py_quality_assessment/quality_assessment/annotations.py
index a4e9097320..5c8c8bacbc 100644
--- a/modules/audio_processing/test/py_quality_assessment/quality_assessment/annotations.py
+++ b/modules/audio_processing/test/py_quality_assessment/quality_assessment/annotations.py
@@ -58,7 +58,7 @@ class AudioAnnotationsExtractor(object):
         vads.append("apm")
       return "VadType({})".format(", ".join(vads))
 
-  _OUTPUT_FILENAME = 'annotations.npz'
+  _OUTPUT_FILENAME_TEMPLATE = '{}annotations.npz'
 
   # Level estimation params.
   _ONE_DB_REDUCTION = np.power(10.0, -1.0 / 20.0)
@@ -112,8 +112,8 @@ class AudioAnnotationsExtractor(object):
       self._VAD_WEBRTC_APM_PATH
 
   @classmethod
-  def GetOutputFileName(cls):
-    return cls._OUTPUT_FILENAME
+  def GetOutputFileNameTemplate(cls):
+    return cls._OUTPUT_FILENAME_TEMPLATE
 
   def GetLevel(self):
     return self._level
@@ -177,13 +177,15 @@ class AudioAnnotationsExtractor(object):
     for extvad_name in self._external_vads:
       self._external_vads[extvad_name].Run(filepath)
 
-  def Save(self, output_path):
+  def Save(self, output_path, annotation_name=""):
     ext_kwargs = {'extvad_conf-' + ext_vad:
                   self._external_vads[ext_vad].GetVadOutput()
                   for ext_vad in self._external_vads}
     # pylint: disable=star-args
     np.savez_compressed(
-        file=os.path.join(output_path, self._OUTPUT_FILENAME),
+        file=os.path.join(
+            output_path,
+            self.GetOutputFileNameTemplate().format(annotation_name)),
         level=self._level,
         level_frame_size=self._level_frame_size,
         level_frame_size_ms=self._LEVEL_FRAME_SIZE_MS,
diff --git a/modules/audio_processing/test/py_quality_assessment/quality_assessment/annotations_unittest.py b/modules/audio_processing/test/py_quality_assessment/quality_assessment/annotations_unittest.py
index 5fe5f5de9e..5a908e7a44 100644
--- a/modules/audio_processing/test/py_quality_assessment/quality_assessment/annotations_unittest.py
+++ b/modules/audio_processing/test/py_quality_assessment/quality_assessment/annotations_unittest.py
@@ -111,9 +111,11 @@ class TestAnnotationsExtraction(unittest.TestCase):
   def testSaveLoad(self):
     e = annotations.AudioAnnotationsExtractor(self._ALL_VAD_TYPES)
     e.Extract(self._wav_file_path)
-    e.Save(self._tmp_path)
+    e.Save(self._tmp_path, "fake-annotation")
 
-    data = np.load(os.path.join(self._tmp_path, e.GetOutputFileName()))
+    data = np.load(os.path.join(
+        self._tmp_path,
+        e.GetOutputFileNameTemplate().format("fake-annotation")))
     np.testing.assert_array_equal(e.GetLevel(), data['level'])
     self.assertEqual(np.float32, data['level'].dtype)
     np.testing.assert_array_equal(
@@ -146,8 +148,10 @@ class TestAnnotationsExtraction(unittest.TestCase):
           vad_type_value,
           {'fake': FakeExternalFactory()})
       e.Extract(self._wav_file_path)
-      e.Save(self._tmp_path)
-      data = np.load(os.path.join(self._tmp_path, e.GetOutputFileName()))
+      e.Save(self._tmp_path, annotation_name="fake-annotation")
+      data = np.load(os.path.join(
+          self._tmp_path,
+          e.GetOutputFileNameTemplate().format("fake-annotation")))
       self.assertEqual(np.float32, data['extvad_conf-fake'].dtype)
       np.testing.assert_almost_equal(np.arange(100, dtype=np.float32),
                                      data['extvad_conf-fake'])
diff --git a/modules/audio_processing/test/py_quality_assessment/quality_assessment/simulation.py b/modules/audio_processing/test/py_quality_assessment/quality_assessment/simulation.py
index f791ddda6a..e313bf34b4 100644
--- a/modules/audio_processing/test/py_quality_assessment/quality_assessment/simulation.py
+++ b/modules/audio_processing/test/py_quality_assessment/quality_assessment/simulation.py
@@ -271,9 +271,10 @@ class ApmModuleSimulator(object):
         input_signal_filepath, signal)
     data_access.Metadata.SaveFileMetadata(input_signal_filepath, metadata)
 
-  def _ExtractCaptureAnnotations(self, input_filepath, output_path):
+  def _ExtractCaptureAnnotations(self, input_filepath, output_path,
+                                 annotation_name=""):
     self._annotator.Extract(input_filepath)
-    self._annotator.Save(output_path)
+    self._annotator.Save(output_path, annotation_name)
 
   def _Simulate(self, test_data_generators, clean_capture_input_filepath,
                 render_input_filepath, test_data_cache_path,
@@ -337,6 +338,13 @@ class ApmModuleSimulator(object):
           echo_test_data_cache_path, noisy_capture_input_filepath,
           echo_path_filepath)
 
+      # Extract annotations for the APM input mix.
+      apm_input_basepath, apm_input_filename = os.path.split(
+          apm_input_filepath)
+      self._ExtractCaptureAnnotations(
+          apm_input_filepath, apm_input_basepath,
+          os.path.splitext(apm_input_filename)[0] + '-')
+
       # Simulate a call using APM.
       self._audioproc_wrapper.Run(
           config_filepath=config_filepath,