diff --git a/core/blockchain_test.go b/core/blockchain_test.go
index 1d0dcae0c7..9eebc973dc 100644
--- a/core/blockchain_test.go
+++ b/core/blockchain_test.go
@@ -216,10 +216,12 @@ func TestNoInsertPastL2MigrationBlock(t *testing.T) {
 	migrationBlock := 2
 	blockchain.chainConfig.L2MigrationBlock = big.NewInt(int64(migrationBlock))
 
-	blocks := makeBlockChain(blockchain.CurrentBlock(), 100000000, mockEngine.NewFullFaker(), blockchain.db, 0)
+	blocks := makeBlockChain(blockchain.CurrentBlock(), 1000000, mockEngine.NewFullFaker(), blockchain.db, 0)
 	failedBlock, err := blockchain.InsertChain(blocks)
 	require.EqualError(t, err, errInsertionInterrupted.Error())
+	// Compare with migrationBlock-1 because failedBlock is the index of the failed block in the blocks[] array, not in the actual blockchain.
 	require.EqualValues(t, migrationBlock-1, failedBlock)
+	// Only the first block in blocks[] should be inserted
 	if blocks[migrationBlock-2].Hash() != rawdb.ReadHeadBlockHash(blockchain.db) {
 		t.Fatalf("Write/Get HeadBlockHash failed")
 	}
diff --git a/e2e_test/e2e_test.go b/e2e_test/e2e_test.go
index 805ce6d0be..06875b8c3d 100644
--- a/e2e_test/e2e_test.go
+++ b/e2e_test/e2e_test.go
@@ -423,7 +423,7 @@ func TestStopNetworkAtL2Block(t *testing.T) {
 	require.NoError(t, err)
 	defer shutdown()
 
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second*100)
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*400)
 	defer cancel()
 
 	runStopNetworkAtL2BlockTest(ctx, t, network, l2BlockOG)