diff --git a/tests/31plugin.tests b/tests/31plugin.tests
index d3e333408..15f7e7a90 100644
--- a/tests/31plugin.tests
+++ b/tests/31plugin.tests
@@ -7,6 +7,7 @@ return: 0
 END
 
 export LUMIERA_PLUGIN_PATH=.libs
+export LUMIERA_CONFIG_PATH=./
 
 TEST "discovering plugins" plugin_discover <<END
 out: found plugin: .libs/examplepluginc.so
@@ -37,3 +38,4 @@ return: 0
 END
 
 unset LUMIERA_PLUGIN_PATH
+unset LUMIERA_CONFIG_PATH