diff --git a/TTS/vocoder/utils/generic_utils.py b/TTS/vocoder/utils/generic_utils.py
index b43a1263..05ceba6b 100644
--- a/TTS/vocoder/utils/generic_utils.py
+++ b/TTS/vocoder/utils/generic_utils.py
@@ -61,7 +61,7 @@ def plot_results(y_hat, y, ap, global_step, name_prefix):
     return figures
 
 
-def to_camel(text, cap=True):
+def to_camel(text):
     text = text.capitalize()
     return re.sub(r'(?!^)_([a-zA-Z])', lambda m: m.group(1).upper(), text)
 
diff --git a/tests/inputs/test_vocoder_wavernn_config.json b/tests/inputs/test_vocoder_wavernn_config.json
index 9df32fef..3c6d06f5 100644
--- a/tests/inputs/test_vocoder_wavernn_config.json
+++ b/tests/inputs/test_vocoder_wavernn_config.json
@@ -54,6 +54,9 @@
     "mulaw": false,         		// apply mulaw if mode is bits
     "padding": 2,			// pad the input for resnet to see wider input length
 
+    // GENERATOR - for backward compatibility
+    "generator_model": "WaveRNN",
+
     // DATASET
     //"use_gta": true,				// use computed gta features from the tts model
     "data_path": "tests/data/ljspeech/wavs/",	// path containing training wav files