diff --git a/mozilla/security/nss/tests/chains/chains.sh b/mozilla/security/nss/tests/chains/chains.sh
index 9e4f68b4811..6aec8ffc286 100644
--- a/mozilla/security/nss/tests/chains/chains.sh
+++ b/mozilla/security/nss/tests/chains/chains.sh
@@ -651,7 +651,7 @@ revoke_cert()
     set_cert_sn
 
     DATE=$(date -u '+%Y%m%d%H%M%SZ')
-    while [ "${DATE}" == "${DATE_LAST}" ]; do
+    while [ "${DATE}" = "${DATE_LAST}" ]; do
         sleep 1
         DATE=$(date -u '+%Y%m%d%H%M%SZ')
     done