diff --git a/packages/contracts-bedrock/contracts/test/CrossDomainMessenger.t.sol b/packages/contracts-bedrock/contracts/test/CrossDomainMessenger.t.sol
index afbb9a960db1b..33a8cd76691f2 100644
--- a/packages/contracts-bedrock/contracts/test/CrossDomainMessenger.t.sol
+++ b/packages/contracts-bedrock/contracts/test/CrossDomainMessenger.t.sol
@@ -92,7 +92,7 @@ contract ExternalRelay is CommonTest {
     /**
      * @notice Helper function to get the callData for an `externalCallWithMinGas
      */
-    function getCallData() public returns (bytes memory) {
+    function getCallData() public pure returns (bytes memory) {
         return abi.encodeWithSelector(ExternalRelay.externalCallWithMinGas.selector);
     }