diff --git a/tensorflow/python/framework/test_util.py b/tensorflow/python/framework/test_util.py
index 8c1eaf05baf954..e707dbd5db742b 100644
--- a/tensorflow/python/framework/test_util.py
+++ b/tensorflow/python/framework/test_util.py
@@ -1331,13 +1331,17 @@ def decorated(self, *args, **kwargs):
 def is_gpu_available(cuda_only=False, min_cuda_compute_capability=None):
   """Returns whether TensorFlow can access a GPU.
 
+  Warning: if not GPU version of the package is installed, the function would
+  also, return False. Use `tf.test.is_built_with_cuda` to validate if TensorFlow
+  was build with CUDA support.
+
   Args:
-    cuda_only: limit the search to CUDA gpus.
+    cuda_only: limit the search to CUDA GPUs.
     min_cuda_compute_capability: a (major,minor) pair that indicates the minimum
       CUDA compute capability required, or None if no requirement.
 
   Returns:
-    True if a gpu device of the requested kind is available.
+    True if a GPU device of the requested kind is available.
   """
 
   def compute_capability_from_device_desc(device_desc):