diff --git a/lib/testing/src/lib/core/utils/string.util.ts b/lib/testing/src/lib/core/utils/string.util.ts
index 2c7abdcab7..22a0249759 100644
--- a/lib/testing/src/lib/core/utils/string.util.ts
+++ b/lib/testing/src/lib/core/utils/string.util.ts
@@ -35,6 +35,15 @@ export class StringUtil {
         return StringUtil.generateRandomCharset(length, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789');
     }
 
+    /**
+     * Generates a random lowercase string.
+     *
+     * @param length If this parameter is not provided the length is set to 8 by default.
+     */
+    static generateRandomLowercaseString(length: number = 8): string {
+        return StringUtil.generateRandomCharset(length, 'abcdefghijklmnopqrstuvwxyz0123456789');
+    }
+
     /**
      * Generates a random email address following the format: abcdef@activiti.test.com
      *