diff --git a/Jenkinsfile b/Jenkinsfile
index 7495540..1b9e35f 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -196,7 +196,7 @@
     def retryBuilds = []
     flaky.each {
         def mode = it.key
-        Builds.verification.remove(mode)
+        Builds.verification = Builds.verification.findAll { it.key != mode }
         retryBuilds += mode
     }