diff --git a/src/interfaces/IWorldID.sol b/src/interfaces/IWorldID.sol
index 9266d15..4008725 100644
--- a/src/interfaces/IWorldID.sol
+++ b/src/interfaces/IWorldID.sol
@@ -25,5 +25,5 @@ interface IWorldID is IBaseWorldID {
         uint256 nullifierHash,
         uint256 externalNullifierHash,
         uint256[8] calldata proof
-    ) external;
+    ) external view;
 }
diff --git a/src/test/mock/SimpleStateBridge.sol b/src/test/mock/SimpleStateBridge.sol
index f1485bc..aff6f4e 100644
--- a/src/test/mock/SimpleStateBridge.sol
+++ b/src/test/mock/SimpleStateBridge.sol
@@ -20,16 +20,13 @@ contract SimpleStateBridge is IBridge, IWorldID {
         emit SetRootHistoryExpiry(expiryTime);
     }
 
-    event ProofVerified(uint256 indexed root);
-
     error ProofNotVerified();
 
-    function verifyProof(uint256 root, uint256, uint256, uint256, uint256[8] calldata proof)
+    function verifyProof(uint256, uint256, uint256, uint256, uint256[8] calldata proof)
         external
+        pure
     {
-        if (proof[0] % 2 == 0) {
-            emit ProofVerified(root);
-        } else {
+        if (proof[0] % 2 != 0) {
             revert ProofNotVerified();
         }
     }
diff --git a/src/test/router/WorldIDRouterStateBridge.t.sol b/src/test/router/WorldIDRouterStateBridge.t.sol
index 1c7621f..1a6a1fc 100644
--- a/src/test/router/WorldIDRouterStateBridge.t.sol
+++ b/src/test/router/WorldIDRouterStateBridge.t.sol
@@ -90,10 +90,7 @@ contract WorldIDRouterStateBridge is WorldIDRouterTest {
         bool shouldSucceed = proof[0] % 2 == 0;
 
         bytes memory errorData = new bytes(0);
-        if (shouldSucceed) {
-            vm.expectEmit(true, true, true, true);
-            emit ProofVerified(root);
-        } else {
+        if (!shouldSucceed) {
             errorData = abi.encodeWithSelector(SimpleStateBridge.ProofNotVerified.selector);
         }