diff --git a/crates/credentials/src/credentials.rs b/crates/credentials/src/credentials.rs
index 5346b5082..ee91be452 100644
--- a/crates/credentials/src/credentials.rs
+++ b/crates/credentials/src/credentials.rs
@@ -474,6 +474,16 @@ mod tests {
         }
     }
 
+    #[test]
+    fn test_gen_secret_key_uses_url_safe_base64_without_padding() {
+        let key = gen_secret_key(32).expect("secret key should generate");
+
+        assert_eq!(key.len(), 32);
+        assert!(!key.contains('/'));
+        assert!(!key.contains('+'));
+        assert!(!key.contains('='));
+    }
+
     #[test]
     fn test_masked_debug() {
         // Test None