diff --git a/src/transformers/pipelines/text_generation.py b/src/transformers/pipelines/text_generation.py
index 2ac4cdeaf511..c560e3b2087a 100644
--- a/src/transformers/pipelines/text_generation.py
+++ b/src/transformers/pipelines/text_generation.py
@@ -130,6 +130,8 @@ def _sanitize_parameters(
 
         postprocess_params = {}
         if return_full_text is not None and return_type is None:
+            if return_text is not None:
+                raise ValueError("`return_text` is mutually exclusive with `return_full_text`")
             return_type = ReturnType.FULL_TEXT if return_full_text else ReturnType.NEW_TEXT
         if return_tensors is not None and return_type is None:
             return_type = ReturnType.TENSORS
diff --git a/tests/pipelines/test_pipelines_text_generation.py b/tests/pipelines/test_pipelines_text_generation.py
index ca0e10115845..479624110991 100644
--- a/tests/pipelines/test_pipelines_text_generation.py
+++ b/tests/pipelines/test_pipelines_text_generation.py
@@ -201,6 +201,9 @@ def run_pipeline_test(self, text_generator, _):
                 ],
             )
 
+        with self.assertRaises(ValueError):
+            outputs = text_generator("test", return_full_text=True, return_text=True)
+
         # Empty prompt is slighly special
         # it requires BOS token to exist.
         # Special case for Pegasus which will always append EOS so will