1 files changed, 8 insertions, 5 deletions
diff --git a/tensorflow/contrib/signal/python/kernel_tests/mel_ops_test.py b/tensorflow/contrib/signal/python/kernel_tests/mel_ops_test.py
index 345eb6cfaa..f4348e80ea 100644
--- a/tensorflow/contrib/signal/python/kernel_tests/mel_ops_test.py
+++ b/tensorflow/contrib/signal/python/kernel_tests/mel_ops_test.py
@@ -53,7 +53,8 @@ def spectrogram_to_mel_matrix(num_mel_bins=20,
                               num_spectrogram_bins=129,
                               audio_sample_rate=8000,
                               lower_edge_hertz=125.0,
-                              upper_edge_hertz=3800.0):
+                              upper_edge_hertz=3800.0,
+                              unused_dtype=None):
   """Return a matrix that can post-multiply spectrogram rows to make mel.
 
   Copied from
@@ -132,9 +133,9 @@ class LinearToMelTest(test.TestCase):
     # lower_edge_hertz, upper_edge_hertz) to test.
     configs = [
         # Defaults.
-        (20, 129, 8000.0, 125.0, 3800.0),
+        (20, 129, 8000.0, 125.0, 3800.0, dtypes.float64),
         # Settings used by Tacotron (https://arxiv.org/abs/1703.10135).
-        (80, 1025, 24000.0, 80.0, 12000.0)
+        (80, 1025, 24000.0, 80.0, 12000.0, dtypes.float64)
     ]
     with self.test_session(use_gpu=True):
       for config in configs:
@@ -143,7 +144,8 @@ class LinearToMelTest(test.TestCase):
         self.assertAllClose(mel_matrix_np, mel_matrix.eval(), atol=3e-6)
 
   def test_dtypes(self):
-    for dtype in (dtypes.float16, dtypes.float32, dtypes.float64):
+    # LinSpace is not supported for tf.float16.
+    for dtype in (dtypes.bfloat16, dtypes.float32, dtypes.float64):
       self.assertEqual(dtype,
                        mel_ops.linear_to_mel_weight_matrix(dtype=dtype).dtype)
 
@@ -167,7 +169,8 @@ class LinearToMelTest(test.TestCase):
 
   def test_constant_folding(self):
     """Mel functions should be constant foldable."""
-    for dtype in (dtypes.float16, dtypes.float32, dtypes.float64):
+    # TODO(rjryan): tf.bloat16 cannot be constant folded by Grappler.
+    for dtype in (dtypes.float32, dtypes.float64):
       g = ops.Graph()
       with g.as_default():
         mel_matrix = mel_ops.linear_to_mel_weight_matrix(dtype=dtype)