diff --git a/speech/microphone/noxfile.py b/speech/microphone/noxfile.py
index b008613f03ff..1fd8956fbf01 100644
--- a/speech/microphone/noxfile.py
+++ b/speech/microphone/noxfile.py
@@ -98,6 +98,10 @@ def get_pytest_env_vars() -> Dict[str, str]:
     "True",
     "true",
 )
+
+# Error if a python version is missing
+nox.options.error_on_missing_interpreters = True
+
 #
 # Style Checks
 #
diff --git a/speech/snippets/noxfile.py b/speech/snippets/noxfile.py
index b008613f03ff..1fd8956fbf01 100644
--- a/speech/snippets/noxfile.py
+++ b/speech/snippets/noxfile.py
@@ -98,6 +98,10 @@ def get_pytest_env_vars() -> Dict[str, str]:
     "True",
     "true",
 )
+
+# Error if a python version is missing
+nox.options.error_on_missing_interpreters = True
+
 #
 # Style Checks
 #