diff --git a/pkg/core/blockchain_test.go b/pkg/core/blockchain_test.go
index 848c8e54d..3bbf4b043 100644
--- a/pkg/core/blockchain_test.go
+++ b/pkg/core/blockchain_test.go
@@ -238,6 +238,7 @@ func TestGetBlock(t *testing.T) {
 		t.Run("non-empty block", func(t *testing.T) {
 			tx, err := testchain.NewTransferFromOwner(bc, bc.contracts.NEO.Hash,
 				random.Uint160(), 1, 1, 1000)
+			require.NoError(t, err)
 			b := bc.newBlock(tx)
 			require.NoError(t, bc.AddHeaders(&b.Header))
 
diff --git a/pkg/core/native_designate_test.go b/pkg/core/native_designate_test.go
index f66d464fc..6f8bacb7f 100644
--- a/pkg/core/native_designate_test.go
+++ b/pkg/core/native_designate_test.go
@@ -130,10 +130,10 @@ func TestDesignate_DesignateAsRole(t *testing.T) {
 	ic.SpawnVM()
 	ic.VM.LoadScript([]byte{byte(opcode.RET)})
 
-	pubs, index, err := des.GetDesignatedByRole(bc.dao, 0xFF, 255)
+	_, _, err := des.GetDesignatedByRole(bc.dao, 0xFF, 255)
 	require.True(t, errors.Is(err, native.ErrInvalidRole), "got: %v", err)
 
-	pubs, index, err = des.GetDesignatedByRole(bc.dao, noderoles.Oracle, 255)
+	pubs, index, err := des.GetDesignatedByRole(bc.dao, noderoles.Oracle, 255)
 	require.NoError(t, err)
 	require.Equal(t, 0, len(pubs))
 	require.Equal(t, uint32(0), index)
diff --git a/pkg/core/stateroot_test.go b/pkg/core/stateroot_test.go
index fafdc0c82..39df0e959 100644
--- a/pkg/core/stateroot_test.go
+++ b/pkg/core/stateroot_test.go
@@ -215,6 +215,7 @@ func TestStateRootFull(t *testing.T) {
 	require.Eventually(t, func() bool { return lastHeight.Load() == 2 }, time.Second, time.Millisecond)
 	checkVoteBroadcasted(t, bc, lastValidated.Load().(*payload.Extensible), 2, 1)
 	_, err = persistBlock(bc)
+	require.NoError(t, err)
 	require.Eventually(t, func() bool { return lastHeight.Load() == 3 }, time.Second, time.Millisecond)
 	checkVoteBroadcasted(t, bc, lastValidated.Load().(*payload.Extensible), 3, 1)
 
@@ -257,6 +258,7 @@ func checkVoteBroadcasted(t *testing.T, bc *Blockchain, p *payload.Extensible,
 	require.Equal(t, int32(valIndex), vote.ValidatorIndex)
 
 	pubs, _, err := bc.contracts.Designate.GetDesignatedByRole(bc.dao, noderoles.StateValidator, bc.BlockHeight())
+	require.NoError(t, err)
 	require.True(t, len(pubs) > int(valIndex))
 	require.True(t, pubs[valIndex].VerifyHashable(vote.Signature, uint32(netmode.UnitTestNet), r))
 }