diff --git a/tests/0_lib/functions.sh b/tests/0_lib/functions.sh
index 42400a3..b112151 100755
--- a/tests/0_lib/functions.sh
+++ b/tests/0_lib/functions.sh
@@ -5,7 +5,7 @@ export readonly PASS=0
 export readonly FAIL=1
 
 # set debug level of yum install in t_InstallPackage
-YUMDEBUG=0
+export YUMDEBUG=0
 
 # Description: call this function whenever you need to log output (preferred to calling echo)
 # Arguments: log string to display