diff --git a/op-service/sources/l1_beacon_client_test.go b/op-service/sources/l1_beacon_client_test.go
index 685f5cccf3d..10fdb3755d5 100644
--- a/op-service/sources/l1_beacon_client_test.go
+++ b/op-service/sources/l1_beacon_client_test.go
@@ -418,14 +418,14 @@ func TestRequestDuplicateBlobHashes(t *testing.T) {
 	hashes := []eth.IndexedBlobHash{hash0, hash2, hash1, sameHash} // Mix up the order.
 	beaconBlobs := []*eth.Blob{&sidecar0.Blob, &sidecar1.Blob, &sidecar2.Blob, &sameHashSidecar.Blob}
 
-	invalidBlob0 := sidecar0.Blob
-	invalidBlob0[10]++
-
 	// construct the mock response for the beacon blobs call
 	beaconBlobsResponse := eth.APIBeaconBlobsResponse{Data: beaconBlobs}
 	p.EXPECT().BeaconBlobs(ctx, uint64(1), hashes).Return(beaconBlobsResponse, nil)
 
 	resp, err := client.GetBlobs(ctx, ref, hashes)
 	require.NoError(t, err)
+	for i, blob := range resp {
+		require.NotNil(t, blob, fmt.Sprintf("blob at index %d should not be nil", i))
+	}
 	require.Equal(t, []*eth.Blob{&sidecar0.Blob, &sidecar2.Blob, &sidecar1.Blob, &sameHashSidecar.Blob}, resp)
 }