diff --git a/contracts/LabHelper.sol b/contracts/LabHelper.sol
new file mode 100644
index 000000000..bf25dd3f2
--- /dev/null
+++ b/contracts/LabHelper.sol
@@ -0,0 +1,4 @@
+function testContract(address contractAddress) public {
+        require(contractAddress != address(0), "Contract address cannot be zero");
+        // ... rest of the function remains the same
+    }
\ No newline at end of file