diff --git a/op-acceptance-tests/tests/isthmus/preinterop/interop_readiness_test.go b/op-acceptance-tests/tests/isthmus/preinterop/interop_readiness_test.go
index 87d86de6f92..04c134ecc0d 100644
--- a/op-acceptance-tests/tests/isthmus/preinterop/interop_readiness_test.go
+++ b/op-acceptance-tests/tests/isthmus/preinterop/interop_readiness_test.go
@@ -103,7 +103,6 @@ func init() {
 }
 
 func TestInteropReadiness(gt *testing.T) {
-	gt.Skip("TODO(#18616): Skipping interop readiness test for now")
 	t := devtest.ParallelT(gt)
 	sys := presets.NewSimpleInterop(t)
 
diff --git a/op-devstack/sysgo/superroot.go b/op-devstack/sysgo/superroot.go
index 42d78e6cca4..942cc3f065b 100644
--- a/op-devstack/sysgo/superroot.go
+++ b/op-devstack/sysgo/superroot.go
@@ -523,6 +523,26 @@ func resetOwnershipAfterMigration(
 		l1PAO,
 	)
 
+	// The migration temporarily transfers ownership of each portal ProxyAdmin to the DelegateCallProxy
+	// to satisfy the delegatecall requirement of the OPCM. Reset these back to the L1 proxy admin owner
+	// after the shared admin contracts are restored.
+	for _, cfg := range opChainConfigs {
+		portal := getOptimismPortal(t, w3Client, cfg.SystemConfigProxy)
+		portalProxyAdmin := getProxyAdmin(t, w3Client, portal)
+		// In some setups the migration may already restore ownership. Only reset when still owned by the proxy.
+		if getOwner(t, w3Client, portalProxyAdmin) == delegateCallProxy {
+			transferOwnershipForDelegateCallProxy(
+				t,
+				l1ChainID,
+				ownerPrivateKey,
+				client,
+				delegateCallProxy,
+				portalProxyAdmin,
+				l1PAO,
+			)
+		}
+	}
+
 	// The Proxy Admin owner is changed. Assert that the admin of other proxies are consistent
 	var sharedAnchorStateRegistryProxy common.Address
 	err = w3Client.Call(w3eth.CallFunc(portal0, anchorStateRegistryFn).Returns(&sharedAnchorStateRegistryProxy))