fix variable name

Change-Id: Ia842a86aea2b65400466f77bb91bef5ab48a7313
diff --git a/mk-lab-pipeline.groovy b/mk-lab-pipeline.groovy
index 3988074..30da314 100644
--- a/mk-lab-pipeline.groovy
+++ b/mk-lab-pipeline.groovy
@@ -94,7 +94,7 @@
             salt.installOpenstackMcpControl(saltMaster)
         }
 
-        if (K8S_RUN_CONFORMANCE_TESTS == true) {
+        if (K8S_RUN_CONFORMANCE_TEST == true) {
             stage("Run k8s conformance e2e tests") {
                 salt.runConformanceTests(saltMaster, K8S_API_SERVER, K8S_CONFORMANCE_IMAGE)
             }