diff --git a/tox.ini b/tox.ini
index ca8373662bd839c17fc6f136e8483d60c68c7731..89ca6d7a190a894d0c88b5c902fbee3cf0102016 100644
--- a/tox.ini
+++ b/tox.ini
@@ -51,7 +51,8 @@ usedevelop=true
 commands =
     /usr/bin/find "{toxinidir}" -name '*.pyc' -delete
     coverage run {env:COVERAGE_OPTS:} --source="{toxinidir}/synapse" \
-        "{envbindir}/trial" {env:TRIAL_FLAGS:} {posargs:tests/metrics} {env:TOXSUFFIX:}
+        "{envbindir}/trial" {env:TRIAL_FLAGS:} {posargs:tests/metrics tests/config} \
+        {env:TOXSUFFIX:}
     {env:DUMP_COVERAGE_COMMAND:coverage report -m}
 
 [testenv:packaging]