diff --git a/tox.ini b/tox.ini
index 80cd402838..69aa98f961 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,7 +16,7 @@ deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 passenv = TEMPEST_* OS_TEST_*
 commands =
-  find . -type f -name "*.pyc" -delete
+  find . -type f -name "*.py[c|o]" -delete
   bash tools/pretty_tox.sh '{posargs}'
 
 [testenv:debug]
@@ -33,7 +33,7 @@ setenv = OS_TEST_PATH=./magnum/tests/functional/api
 deps =
   {[testenv]deps}
 commands =
-  find . -type f -name "*.pyc" -delete
+  find . -type f -name "*.py[c|o]" -delete
   bash tools/pretty_tox.sh '{posargs}'
 
 [testenv:functional-k8s]
@@ -43,7 +43,7 @@ setenv = OS_TEST_PATH=./magnum/tests/functional/k8s
 deps =
   {[testenv]deps}
 commands =
-  find . -type f -name "*.pyc" -delete
+  find . -type f -name "*.py[c|o]" -delete
   bash tools/pretty_tox.sh '{posargs}'
 
 [testenv:functional-k8s-ironic]
@@ -53,7 +53,7 @@ setenv = OS_TEST_PATH=./magnum/tests/functional/k8s_ironic
 deps =
   {[testenv]deps}
 commands =
-  find . -type f -name "*.pyc" -delete
+  find . -type f -name "*.py[c|o]" -delete
   bash tools/pretty_tox.sh '{posargs}'
 
 [testenv:functional-k8s-coreos]
@@ -63,7 +63,7 @@ setenv = OS_TEST_PATH=./magnum/tests/functional/k8s_coreos
 deps =
   {[testenv]deps}
 commands =
-  find . -type f -name "*.pyc" -delete
+  find . -type f -name "*.py[c|o]" -delete
   bash tools/pretty_tox.sh '{posargs}'
 
 [testenv:functional-swarm]
@@ -73,7 +73,7 @@ setenv = OS_TEST_PATH=./magnum/tests/functional/swarm
 deps =
   {[testenv]deps}
 commands =
-  find . -type f -name "*.pyc" -delete
+  find . -type f -name "*.py[c|o]" -delete
   bash tools/pretty_tox.sh '{posargs}'
 
 [testenv:functional-mesos]
@@ -83,7 +83,7 @@ setenv = OS_TEST_PATH=./magnum/tests/functional/mesos
 deps =
   {[testenv]deps}
 commands =
-  find . -type f -name "*.pyc" -delete
+  find . -type f -name "*.py[c|o]" -delete
   bash tools/pretty_tox.sh '{posargs}'
 
 [testenv:pep8]