diff --git a/pkgs/development/python-modules/google_cloud_asset/default.nix b/pkgs/development/python-modules/google_cloud_asset/default.nix
index 96ee38b3e44..90c8e752d41 100644
--- a/pkgs/development/python-modules/google_cloud_asset/default.nix
+++ b/pkgs/development/python-modules/google_cloud_asset/default.nix
@@ -5,6 +5,7 @@
 , grpc_google_iam_v1
 , google_api_core
 , pytest
+, mock
 }:
 
 buildPythonPackage rec {
@@ -16,7 +17,7 @@ buildPythonPackage rec {
     sha256 = "233157c5d902a084477fb5fe6ca1f946d6fe7911577d4a36aee0227777db61b7";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ enum34 grpc_google_iam_v1 google_api_core ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/google_cloud_automl/default.nix b/pkgs/development/python-modules/google_cloud_automl/default.nix
index 013e6369934..7f605d73c97 100644
--- a/pkgs/development/python-modules/google_cloud_automl/default.nix
+++ b/pkgs/development/python-modules/google_cloud_automl/default.nix
@@ -4,6 +4,7 @@
 , enum34
 , google_api_core
 , pytest
+, mock
 }:
 
 buildPythonPackage rec {
@@ -15,7 +16,7 @@ buildPythonPackage rec {
     sha256 = "32890d1e043eb09a86ff1839096dfb49051cd436bdf1a1708299484cfd06db1a";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ enum34 google_api_core ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/google_cloud_bigquery_datatransfer/default.nix b/pkgs/development/python-modules/google_cloud_bigquery_datatransfer/default.nix
index 6d2b5ba8f16..23f08f3bbef 100644
--- a/pkgs/development/python-modules/google_cloud_bigquery_datatransfer/default.nix
+++ b/pkgs/development/python-modules/google_cloud_bigquery_datatransfer/default.nix
@@ -3,6 +3,7 @@
 , fetchPypi
 , google_api_core
 , pytest
+, mock
 }:
 
 buildPythonPackage rec {
@@ -14,7 +15,7 @@ buildPythonPackage rec {
     sha256 = "02bf1a508ffbc730904fd8a5e7d7c33946f0aa539127c1b1e235dfdedd7bc9a5";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ google_api_core ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/google_cloud_container/default.nix b/pkgs/development/python-modules/google_cloud_container/default.nix
index 8941206c3fc..f0a47d7c30f 100644
--- a/pkgs/development/python-modules/google_cloud_container/default.nix
+++ b/pkgs/development/python-modules/google_cloud_container/default.nix
@@ -3,6 +3,7 @@
 , fetchPypi
 , google_api_core
 , pytest
+, mock
 }:
 
 buildPythonPackage rec {
@@ -14,7 +15,7 @@ buildPythonPackage rec {
     sha256 = "566834ef43e79917b112e3bd2848e84cfb0f4d7b565581607e2548f5c8e5d87a";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ google_api_core ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/google_cloud_dataproc/default.nix b/pkgs/development/python-modules/google_cloud_dataproc/default.nix
index 1d137ded4be..b36f651e2f7 100644
--- a/pkgs/development/python-modules/google_cloud_dataproc/default.nix
+++ b/pkgs/development/python-modules/google_cloud_dataproc/default.nix
@@ -3,6 +3,7 @@
 , fetchPypi
 , google_api_core
 , pytest
+, mock
 }:
 
 buildPythonPackage rec {
@@ -14,7 +15,7 @@ buildPythonPackage rec {
     sha256 = "3acbb1bd9e25fd233ae321c137a58306d5d0ef262e3cbe825c511c8ef55b33a2";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ google_api_core ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/google_cloud_dlp/default.nix b/pkgs/development/python-modules/google_cloud_dlp/default.nix
index 724a0988f9e..0f46ff36a39 100644
--- a/pkgs/development/python-modules/google_cloud_dlp/default.nix
+++ b/pkgs/development/python-modules/google_cloud_dlp/default.nix
@@ -4,6 +4,7 @@
 , enum34
 , google_api_core
 , pytest
+, mock
 }:
 
 buildPythonPackage rec {
@@ -15,7 +16,7 @@ buildPythonPackage rec {
     sha256 = "5cc7e40842b6c3dc586d04e3d2b2326b44afbe3896da6a30032d64650a7c6b00";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ enum34 google_api_core ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/google_cloud_iot/default.nix b/pkgs/development/python-modules/google_cloud_iot/default.nix
index 99eb35f1b4e..1e103ab1425 100644
--- a/pkgs/development/python-modules/google_cloud_iot/default.nix
+++ b/pkgs/development/python-modules/google_cloud_iot/default.nix
@@ -5,6 +5,7 @@
 , grpc_google_iam_v1
 , google_api_core
 , pytest
+, mock
 }:
 
 buildPythonPackage rec {
@@ -16,7 +17,7 @@ buildPythonPackage rec {
     sha256 = "b274fb5d38cfaa556a07943d9c9a23ca4aa3ecca51135a70325e1c95fa699474";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ enum34 grpc_google_iam_v1 google_api_core ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/google_cloud_kms/default.nix b/pkgs/development/python-modules/google_cloud_kms/default.nix
index e04a9798e7a..cf5476f7d1d 100644
--- a/pkgs/development/python-modules/google_cloud_kms/default.nix
+++ b/pkgs/development/python-modules/google_cloud_kms/default.nix
@@ -5,6 +5,7 @@
 , grpc_google_iam_v1
 , google_api_core
 , pytest
+, mock
 }:
 
 buildPythonPackage rec {
@@ -16,7 +17,7 @@ buildPythonPackage rec {
     sha256 = "3e9d9e07af8651826db5997ca0f11f02401cef42eb822d416a19df05b17c5a45";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ enum34 grpc_google_iam_v1 google_api_core ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/google_cloud_language/default.nix b/pkgs/development/python-modules/google_cloud_language/default.nix
index 60ceb9b97ae..c48c0c7b16c 100644
--- a/pkgs/development/python-modules/google_cloud_language/default.nix
+++ b/pkgs/development/python-modules/google_cloud_language/default.nix
@@ -4,6 +4,7 @@
 , enum34
 , google_api_core
 , pytest
+, mock
 }:
 
 buildPythonPackage rec {
@@ -15,7 +16,7 @@ buildPythonPackage rec {
     sha256 = "e4742b98e2d69ca21864e3218805a9db7e04e06f0672f2385cf6b5361ee35605";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ enum34 google_api_core ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/google_cloud_redis/default.nix b/pkgs/development/python-modules/google_cloud_redis/default.nix
index 2c2d022d142..4b574b85923 100644
--- a/pkgs/development/python-modules/google_cloud_redis/default.nix
+++ b/pkgs/development/python-modules/google_cloud_redis/default.nix
@@ -4,6 +4,7 @@
 , enum34
 , google_api_core
 , pytest
+, mock
 }:
 
 buildPythonPackage rec {
@@ -15,7 +16,7 @@ buildPythonPackage rec {
     sha256 = "449fd11699f9ae23ec2ccf1b06681bb90b4c1788f82fbbf1ce1c1d2e77833eb1";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ enum34 google_api_core ];
 
   # requires old version of google-api-core (override)
diff --git a/pkgs/development/python-modules/google_cloud_securitycenter/default.nix b/pkgs/development/python-modules/google_cloud_securitycenter/default.nix
index 23a1b5b287d..f9e4161d80d 100644
--- a/pkgs/development/python-modules/google_cloud_securitycenter/default.nix
+++ b/pkgs/development/python-modules/google_cloud_securitycenter/default.nix
@@ -5,6 +5,7 @@
 , grpc_google_iam_v1
 , google_api_core
 , pytest
+, mock
 }:
 
 buildPythonPackage rec {
@@ -16,7 +17,7 @@ buildPythonPackage rec {
     sha256 = "11d19052c84dd8e5bc936f5276443e14c2a5ccaae031b2a39415a9f3832a1029";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ enum34 grpc_google_iam_v1 google_api_core ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/google_cloud_tasks/default.nix b/pkgs/development/python-modules/google_cloud_tasks/default.nix
index 9c03b345600..2036b9aea97 100644
--- a/pkgs/development/python-modules/google_cloud_tasks/default.nix
+++ b/pkgs/development/python-modules/google_cloud_tasks/default.nix
@@ -5,6 +5,7 @@
 , grpc_google_iam_v1
 , google_api_core
 , pytest
+, mock
 }:
 
 buildPythonPackage rec {
@@ -16,7 +17,7 @@ buildPythonPackage rec {
     sha256 = "3c5f26dd3750f9b222a69c37e85ee1acf198456dfebe1e0058f366dd27729559";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ enum34 grpc_google_iam_v1 google_api_core ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/google_cloud_texttospeech/default.nix b/pkgs/development/python-modules/google_cloud_texttospeech/default.nix
index f6dd120f1d3..c2bf189c237 100644
--- a/pkgs/development/python-modules/google_cloud_texttospeech/default.nix
+++ b/pkgs/development/python-modules/google_cloud_texttospeech/default.nix
@@ -3,6 +3,7 @@
 , fetchPypi
 , google_api_core
 , pytest
+, mock
 }:
 
 buildPythonPackage rec {
@@ -14,7 +15,7 @@ buildPythonPackage rec {
     sha256 = "39d2c83ee198ec1995c03faf5d557089e7027a8356802302dee08b18380c8250";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ google_api_core ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/google_cloud_videointelligence/default.nix b/pkgs/development/python-modules/google_cloud_videointelligence/default.nix
index 4bb0f6b30ca..2da82fc4933 100644
--- a/pkgs/development/python-modules/google_cloud_videointelligence/default.nix
+++ b/pkgs/development/python-modules/google_cloud_videointelligence/default.nix
@@ -3,6 +3,7 @@
 , fetchPypi
 , google_api_core
 , pytest
+, mock
 }:
 
 buildPythonPackage rec {
@@ -14,7 +15,7 @@ buildPythonPackage rec {
     sha256 = "382ec37eab72b37571a2a76ad25c9dda51744dbff76ad9a85cc3791fee0c96ef";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ google_api_core ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/google_cloud_websecurityscanner/default.nix b/pkgs/development/python-modules/google_cloud_websecurityscanner/default.nix
index 80793059094..afe1f1db11a 100644
--- a/pkgs/development/python-modules/google_cloud_websecurityscanner/default.nix
+++ b/pkgs/development/python-modules/google_cloud_websecurityscanner/default.nix
@@ -3,6 +3,7 @@
 , fetchPypi
 , google_api_core
 , pytest
+, mock
 }:
 
 buildPythonPackage rec {
@@ -14,7 +15,7 @@ buildPythonPackage rec {
     sha256 = "d965d986053b49e4005b6b6cdf035d7dd4a3b64dcfb6325050b70c97831f8d6f";
   };
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest mock ];
   propagatedBuildInputs = [ google_api_core ];
 
   checkPhase = ''