diff --git a/packages/google-cloud-texttospeech/samples/snippets/quickstart.py b/packages/google-cloud-texttospeech/samples/snippets/quickstart.py
index f9e3da5ccee8..2c2434df75ec 100644
--- a/packages/google-cloud-texttospeech/samples/snippets/quickstart.py
+++ b/packages/google-cloud-texttospeech/samples/snippets/quickstart.py
@@ -24,6 +24,7 @@
 def run_quickstart():
     # [START tts_quickstart]
     """Synthesizes speech from the input string of text or ssml.
+    Make sure to be working in a virtual environment.
 
     Note: ssml must be well-formed according to:
         https://www.w3.org/TR/speech-synthesis/