diff --git a/src/test/identity-manager/WorldIDIdentityManagerIdentityRegistration4844.t.sol b/src/test/identity-manager/WorldIDIdentityManagerIdentityRegistration4844.t.sol
index 596a1f8..9a1e0bc 100644
--- a/src/test/identity-manager/WorldIDIdentityManagerIdentityRegistration4844.t.sol
+++ b/src/test/identity-manager/WorldIDIdentityManagerIdentityRegistration4844.t.sol
@@ -621,4 +621,30 @@ contract WorldIDIdentityManagerIdentityRegistration4844 is WorldIDIdentityManage
         // Test
         assertCallSucceedsOn(identityManagerAddress, callData, new bytes(0));
     }
+
+    /// @notice Tests that identities can only be registered through the proxy.
+    function testCannotRegisterIdentitiesIfNotViaProxy() public {
+        // Setup
+        address expectedOwner = managerImplV3.owner();
+        vm.expectRevert("Function must be called through delegatecall");
+        vm.prank(expectedOwner);
+
+        // Test
+        ManagerImplV3.RegisterIdentities4844Params memory params = ManagerImplV3.RegisterIdentities4844Params({
+            insertionProof: insertionProof,
+            commitments: commitments,
+            commitmentPok: commitmentsPok,
+            kzgCommitment: kzgCommitment,
+            kzgProof: kzgProof,
+            expectedEvaluation: insertionExpectedEvaluation,
+            preRoot: initialRoot,
+            postRoot: insertionPostRoot,
+            kzgChallenge: kzgChallenge,
+            inputHash: insertionInputHash4844,
+            batchSize: uint32(identityCommitments.length),
+            startIndex: startIndex
+        });
+
+        managerImplV3.registerIdentities(params);
+    }
 }