diff --git a/.github/workflows/downstream_testing.yml b/.github/workflows/downstream_testing.yml
index 6f568bf21..0301a4da4 100644
--- a/.github/workflows/downstream_testing.yml
+++ b/.github/workflows/downstream_testing.yml
@@ -60,6 +60,13 @@ jobs:
             matrix_exclude: |
               3.6
 
+          - name: "pytest-mock"
+            repo: "pytest-dev/pytest-mock"
+            docker_profile: "nodb"
+            jobs: "test"
+            workflow_name: "test.yml"
+            matrix_exclude: ""
+
     steps:
     - uses: actions/checkout@v2
       with:
diff --git a/testing/downstream_testing/action_schemas.json b/testing/downstream_testing/action_schemas.json
index 70e2fe3f8..f822db873 100644
--- a/testing/downstream_testing/action_schemas.json
+++ b/testing/downstream_testing/action_schemas.json
@@ -43,5 +43,20 @@
                     "replace": "py\\1\\2"
                 }
         }
+    },
+    "pytest-mock": {
+        "matrix": [
+            "matrix",
+            "python"
+        ],
+        "tox_cmd_build": {
+            "base": "",
+            "prefix": "",
+            "sub":
+                {
+                    "pattern": "(\\d|py\\d)\\.*(\\d+)",
+                    "replace": "py\\1\\2"
+                }
+        }
     }
 }