diff --git a/deepspeech/exps/deepspeech2/model.py b/deepspeech/exps/deepspeech2/model.py
index eea784a58d4fcc1a85d8352d89a260196ffad7d3..a163ef4ca133465f7d93478f1bda48c07fca34fa 100644
--- a/deepspeech/exps/deepspeech2/model.py
+++ b/deepspeech/exps/deepspeech2/model.py
@@ -144,12 +144,6 @@ class DeepSpeech2Trainer(Trainer):
 
         config.data.manifest = config.data.dev_manifest
         config.data.augmentation_config = ""
-        config.data.min_input_len = 0.0  # second
-        config.data.max_input_len = float('inf')  # second
-        config.data.min_output_len = 0.0  # tokens
-        config.data.max_output_len = float('inf')  # tokens
-        config.data.min_output_input_ratio = 0.00
-        config.data.max_output_input_ratio = float('inf')
         dev_dataset = ManifestDataset.from_config(config)
 
         if self.parallel:
diff --git a/deepspeech/exps/u2/model.py b/deepspeech/exps/u2/model.py
index db3c3427927d6e3e2aaac5f28172165d8a6025cf..7a409d98807c18154e3170e2974e4bb5e3e601d3 100644
--- a/deepspeech/exps/u2/model.py
+++ b/deepspeech/exps/u2/model.py
@@ -217,12 +217,6 @@ class U2Trainer(Trainer):
 
         config.data.manifest = config.data.dev_manifest
         config.data.augmentation_config = ""
-        config.data.min_input_len = 0.0  # second
-        config.data.max_input_len = float('inf')  # second
-        config.data.min_output_len = 0.0  # tokens
-        config.data.max_output_len = float('inf')  # tokens
-        config.data.min_output_input_ratio = 0.00
-        config.data.max_output_input_ratio = float('inf')
         dev_dataset = ManifestDataset.from_config(config)
 
         collate_fn = SpeechCollator(keep_transcription_text=False)