diff --git a/vars/git.groovy b/vars/git.groovy
index 3210b2b..ece32b8 100644
--- a/vars/git.groovy
+++ b/vars/git.groovy
@@ -37,7 +37,7 @@ def withSSHCredentials(String credentialsId, Closure fn) {
             keyFileVariable: 'GIT_SSH_IDENTITY_FILE',
         )
     ]) {
-        withEnv(['GIT_SSH_VARIANT=ssh', 'GIT_SSH_COMMAND=ssh -i $GIT_SSH_IDENTITY_FILE -o IdentitiesOnly=yes -o StrictHostKeyChecking=no']) {
+        withEnv(['GIT_SSH_VARIANT=ssh', 'GIT_SSH_COMMAND=ssh -i $GIT_SSH_IDENTITY_FILE -o IdentitiesOnly=yes -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null']) {
             fn.call()
         }
     }