diff --git a/tox.ini b/tox.ini
index e8610ae551..eea4866269 100644
--- a/tox.ini
+++ b/tox.ini
@@ -49,23 +49,16 @@ whitelist_externals = find
 commands =
    find . -type f -name "*.pyc" -delete
    bash -c "if [ ! -d .testrepository ]; then testr init; fi"
-   sudo -g docker testr run ^(test_build).*
+   sudo -g docker testr run test_build.BuildTestCentosBinary
 
 [testenv:images-centos-source]
 whitelist_externals = find
                       bash
                       sudo
-                      echo
-                      mv
-                      rm
 commands =
-   bash -c "if [ -f .buildconf ]; then mv .buildconf buildconf.bak; fi"
-   bash -c "echo PREFIX=centos-source- > .buildconf"
    find . -type f -name "*.pyc" -delete
    bash -c "if [ ! -d .testrepository ]; then testr init; fi"
-   sudo -g docker testr run ^(test_images).*
-   rm -f .buildconf
-   bash -c "if [ -f buildconf.bak ]; then mv buildconf.bak .buildconf; fi"
+   sudo -g docker testr run test_build.BuildTestCentosSource
 
 [testenv:startenv]
 whitelist_externals = bash