diff --git a/.travis/linux_openresty_common_runner.sh b/.travis/linux_openresty_common_runner.sh
index a14ef5ee154f9..abdf2f53a4180 100755
--- a/.travis/linux_openresty_common_runner.sh
+++ b/.travis/linux_openresty_common_runner.sh
@@ -152,7 +152,7 @@ apisix:
     make lint && make license-check || exit 1
 
     # APISIX_ENABLE_LUACOV=1 PERL5LIB=.:$PERL5LIB prove -Itest-nginx/lib -r t
-    # PERL5LIB=.:$PERL5LIB prove -Itest-nginx/lib -r t
+    PERL5LIB=.:$PERL5LIB prove -Itest-nginx/lib -r t
 }
 
 after_success() {