diff --git a/tox.ini b/tox.ini
index bfb2d5786..df76939fd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -90,6 +90,7 @@ pass_env =
 deps =
     pytest
     juju==3.2.0.1
+    pytest-mock
     pytest-operator
     -r {tox_root}/requirements.txt
 commands =
@@ -104,6 +105,7 @@ pass_env =
 deps =
     pytest
     juju==3.2.0.1
+    pytest-mock
     pytest-operator
     -r {tox_root}/requirements.txt
 commands =
@@ -118,6 +120,7 @@ pass_env =
 deps =
     pytest
     juju==3.2.0.1
+    pytest-mock
     pytest-operator
     -r {tox_root}/requirements.txt
 commands =
@@ -132,8 +135,8 @@ pass_env =
 deps =
     pytest
     juju==3.2.0.1
-    pytest-operator
     pytest-mock
+    pytest-operator
     -r {tox_root}/requirements.txt
 commands =
     pytest -v --tb native --log-cli-level=INFO -s --durations=0 {posargs} {[vars]tests_path}/integration/tls_tests/test_tls.py
@@ -152,8 +155,8 @@ pass_env =
 deps =
     pytest
     juju==3.2.0.1
-    pytest-operator
     pytest-mock
+    pytest-operator
     -r {tox_root}/requirements.txt
 commands =
     pytest -v --tb native --log-cli-level=INFO -s --durations=0 {posargs} {[vars]tests_path}/integration/backup_tests/test_backups.py
@@ -167,6 +170,7 @@ pass_env =
 deps =
     pytest
     juju==3.2.0.1
+    pytest-mock
     pytest-operator
     -r {tox_root}/requirements.txt
 commands =
@@ -182,6 +186,7 @@ pass_env =
 deps =
     pytest
     juju==3.2.0.1
+    pytest-mock
     pytest-operator
     -r {tox_root}/requirements.txt
 commands =