diff --git a/pkg/core/interop/crypto/ecdsa_test.go b/pkg/core/interop/crypto/ecdsa_test.go
index c2546c81c..58fab77d6 100644
--- a/pkg/core/interop/crypto/ecdsa_test.go
+++ b/pkg/core/interop/crypto/ecdsa_test.go
@@ -2,9 +2,14 @@ package crypto
 
 import (
 	"encoding/binary"
+	"fmt"
 	"testing"
 
+	"github.com/nspcc-dev/neo-go/pkg/config/netmode"
+	"github.com/nspcc-dev/neo-go/pkg/core/dao"
 	"github.com/nspcc-dev/neo-go/pkg/core/interop"
+	"github.com/nspcc-dev/neo-go/pkg/core/storage"
+	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
 	"github.com/nspcc-dev/neo-go/pkg/vm"
@@ -14,14 +19,116 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func initCHECKMULTISIG(msg []byte, n int) ([]stackitem.Item, []stackitem.Item, map[string]*keys.PublicKey, error) {
+func TestECDSASecp256r1Verify(t *testing.T) {
+	testECDSAVerify(t, true)
+}
+
+func TestECDSASecp256k1Verify(t *testing.T) {
+	testECDSAVerify(t, false)
+}
+
+func testECDSAVerify(t *testing.T, isR1 bool) {
+	var priv *keys.PrivateKey
+	var err error
+	if isR1 {
+		priv, err = keys.NewPrivateKey()
+	} else {
+		priv, err = keys.NewSecp256k1PrivateKey()
+	}
+	require.NoError(t, err)
+
+	verifyFunc := ECDSASecp256r1Verify
+	if !isR1 {
+		verifyFunc = ECDSASecp256k1Verify
+	}
+	d := dao.NewSimple(storage.NewMemoryStore(), netmode.UnitTestNet, false)
+	ic := &interop.Context{DAO: dao.NewCached(d)}
+	runCase := func(t *testing.T, isErr bool, result interface{}, args ...interface{}) {
+		ic.SpawnVM()
+		for i := range args {
+			ic.VM.Estack().PushVal(args[i])
+		}
+
+		var err error
+		func() {
+			defer func() {
+				if r := recover(); r != nil {
+					err = fmt.Errorf("panic: %v", r)
+				}
+			}()
+			err = verifyFunc(ic)
+		}()
+
+		if isErr {
+			require.Error(t, err)
+			return
+		}
+		require.NoError(t, err)
+		require.Equal(t, 1, ic.VM.Estack().Len())
+		require.Equal(t, result, ic.VM.Estack().Pop().Value().(bool))
+	}
+
+	msg := []byte("test message")
+
+	t.Run("success", func(t *testing.T) {
+		sign := priv.Sign(msg)
+		runCase(t, false, true, sign, priv.PublicKey().Bytes(), msg)
+	})
+
+	t.Run("signed interop item", func(t *testing.T) {
+		tx := transaction.New(netmode.UnitTestNet, []byte{0, 1, 2}, 1)
+		msg := tx.GetSignedPart()
+		sign := priv.Sign(msg)
+		runCase(t, false, true, sign, priv.PublicKey().Bytes(), stackitem.NewInterop(tx))
+	})
+
+	t.Run("signed script container", func(t *testing.T) {
+		tx := transaction.New(netmode.UnitTestNet, []byte{0, 1, 2}, 1)
+		msg := tx.GetSignedPart()
+		sign := priv.Sign(msg)
+		ic.Container = tx
+		runCase(t, false, true, sign, priv.PublicKey().Bytes(), stackitem.Null{})
+	})
+
+	t.Run("missing arguments", func(t *testing.T) {
+		runCase(t, true, false)
+		sign := priv.Sign(msg)
+		runCase(t, true, false, sign)
+		runCase(t, true, false, sign, priv.PublicKey().Bytes())
+	})
+
+	t.Run("invalid signature", func(t *testing.T) {
+		sign := priv.Sign(msg)
+		sign[0] = ^sign[0]
+		runCase(t, false, false, sign, priv.PublicKey().Bytes(), msg)
+	})
+
+	t.Run("invalid public key", func(t *testing.T) {
+		sign := priv.Sign(msg)
+		pub := priv.PublicKey().Bytes()
+		pub[0] = 0xFF // invalid prefix
+		runCase(t, true, false, sign, pub, msg)
+	})
+
+	t.Run("invalid message", func(t *testing.T) {
+		sign := priv.Sign(msg)
+		runCase(t, true, false, sign, priv.PublicKey().Bytes(),
+			stackitem.NewArray([]stackitem.Item{stackitem.NewByteArray(msg)}))
+	})
+}
+
+func initCHECKMULTISIG(isR1 bool, msg []byte, n int) ([]stackitem.Item, []stackitem.Item, map[string]*keys.PublicKey, error) {
 	var err error
 
 	keyMap := make(map[string]*keys.PublicKey)
 	pkeys := make([]*keys.PrivateKey, n)
 	pubs := make([]stackitem.Item, n)
 	for i := range pubs {
-		pkeys[i], err = keys.NewPrivateKey()
+		if isR1 {
+			pkeys[i], err = keys.NewPrivateKey()
+		} else {
+			pkeys[i], err = keys.NewSecp256k1PrivateKey()
+		}
 		if err != nil {
 			return nil, nil, nil, err
 		}
@@ -54,18 +161,27 @@ func subSlice(arr []stackitem.Item, indices []int) []stackitem.Item {
 	return result
 }
 
-func initCHECKMULTISIGVM(t *testing.T, n int, ik, is []int) *vm.VM {
+func initCheckMultisigVMNoArgs(isR1 bool) *vm.VM {
 	buf := make([]byte, 5)
 	buf[0] = byte(opcode.SYSCALL)
-	binary.LittleEndian.PutUint32(buf[1:], ecdsaSecp256r1CheckMultisigID)
+	if isR1 {
+		binary.LittleEndian.PutUint32(buf[1:], ecdsaSecp256r1CheckMultisigID)
+	} else {
+		binary.LittleEndian.PutUint32(buf[1:], ecdsaSecp256k1CheckMultisigID)
+	}
 
 	ic := &interop.Context{Trigger: trigger.Verification}
 	Register(ic)
 	v := ic.SpawnVM()
 	v.LoadScript(buf)
+	return v
+}
+
+func initCHECKMULTISIGVM(t *testing.T, isR1 bool, n int, ik, is []int) *vm.VM {
+	v := initCheckMultisigVMNoArgs(isR1)
 	msg := []byte("NEO - An Open Network For Smart Economy")
 
-	pubs, sigs, _, err := initCHECKMULTISIG(msg, n)
+	pubs, sigs, _, err := initCHECKMULTISIG(isR1, msg, n)
 	require.NoError(t, err)
 
 	pubs = subSlice(pubs, ik)
@@ -78,26 +194,34 @@ func initCHECKMULTISIGVM(t *testing.T, n int, ik, is []int) *vm.VM {
 	return v
 }
 
-func testCHECKMULTISIGGood(t *testing.T, n int, is []int) {
-	v := initCHECKMULTISIGVM(t, n, nil, is)
+func testCHECKMULTISIGGood(t *testing.T, isR1 bool, n int, is []int) {
+	v := initCHECKMULTISIGVM(t, isR1, n, nil, is)
 
 	require.NoError(t, v.Run())
 	assert.Equal(t, 1, v.Estack().Len())
 	assert.True(t, v.Estack().Pop().Bool())
 }
 
-func TestCHECKMULTISIGGood(t *testing.T) {
-	t.Run("3_1", func(t *testing.T) { testCHECKMULTISIGGood(t, 3, []int{1}) })
-	t.Run("2_2", func(t *testing.T) { testCHECKMULTISIGGood(t, 2, []int{0, 1}) })
-	t.Run("3_3", func(t *testing.T) { testCHECKMULTISIGGood(t, 3, []int{0, 1, 2}) })
-	t.Run("3_2", func(t *testing.T) { testCHECKMULTISIGGood(t, 3, []int{0, 2}) })
-	t.Run("4_2", func(t *testing.T) { testCHECKMULTISIGGood(t, 4, []int{0, 2}) })
-	t.Run("10_7", func(t *testing.T) { testCHECKMULTISIGGood(t, 10, []int{2, 3, 4, 5, 6, 8, 9}) })
-	t.Run("12_9", func(t *testing.T) { testCHECKMULTISIGGood(t, 12, []int{0, 1, 4, 5, 6, 7, 8, 9}) })
+func TestECDSASecp256r1CheckMultisigGood(t *testing.T) {
+	testCurveCHECKMULTISIGGood(t, true)
 }
 
-func testCHECKMULTISIGBad(t *testing.T, isErr bool, n int, ik, is []int) {
-	v := initCHECKMULTISIGVM(t, n, ik, is)
+func TestECDSASecp256k1CheckMultisigGood(t *testing.T) {
+	testCurveCHECKMULTISIGGood(t, false)
+}
+
+func testCurveCHECKMULTISIGGood(t *testing.T, isR1 bool) {
+	t.Run("3_1", func(t *testing.T) { testCHECKMULTISIGGood(t, isR1, 3, []int{1}) })
+	t.Run("2_2", func(t *testing.T) { testCHECKMULTISIGGood(t, isR1, 2, []int{0, 1}) })
+	t.Run("3_3", func(t *testing.T) { testCHECKMULTISIGGood(t, isR1, 3, []int{0, 1, 2}) })
+	t.Run("3_2", func(t *testing.T) { testCHECKMULTISIGGood(t, isR1, 3, []int{0, 2}) })
+	t.Run("4_2", func(t *testing.T) { testCHECKMULTISIGGood(t, isR1, 4, []int{0, 2}) })
+	t.Run("10_7", func(t *testing.T) { testCHECKMULTISIGGood(t, isR1, 10, []int{2, 3, 4, 5, 6, 8, 9}) })
+	t.Run("12_9", func(t *testing.T) { testCHECKMULTISIGGood(t, isR1, 12, []int{0, 1, 4, 5, 6, 7, 8, 9}) })
+}
+
+func testCHECKMULTISIGBad(t *testing.T, isR1 bool, isErr bool, n int, ik, is []int) {
+	v := initCHECKMULTISIGVM(t, isR1, n, ik, is)
 
 	if isErr {
 		require.Error(t, v.Run())
@@ -108,14 +232,49 @@ func testCHECKMULTISIGBad(t *testing.T, isErr bool, n int, ik, is []int) {
 	assert.False(t, v.Estack().Pop().Bool())
 }
 
-func TestCHECKMULTISIGBad(t *testing.T) {
-	t.Run("1_1 wrong signature", func(t *testing.T) { testCHECKMULTISIGBad(t, false, 2, []int{0}, []int{1}) })
-	t.Run("3_2 wrong order", func(t *testing.T) { testCHECKMULTISIGBad(t, false, 3, []int{0, 2}, []int{2, 0}) })
-	t.Run("3_2 duplicate sig", func(t *testing.T) { testCHECKMULTISIGBad(t, false, 3, nil, []int{0, 0}) })
-	t.Run("1_2 too many signatures", func(t *testing.T) { testCHECKMULTISIGBad(t, true, 2, []int{0}, []int{0, 1}) })
+func TestECDSASecp256r1CheckMultisigBad(t *testing.T) {
+	testCurveCHECKMULTISIGBad(t, true)
+}
+
+func TestECDSASecp256k1CheckMultisigBad(t *testing.T) {
+	testCurveCHECKMULTISIGBad(t, false)
+}
+
+func testCurveCHECKMULTISIGBad(t *testing.T, isR1 bool) {
+	t.Run("1_1 wrong signature", func(t *testing.T) { testCHECKMULTISIGBad(t, isR1, false, 2, []int{0}, []int{1}) })
+	t.Run("3_2 wrong order", func(t *testing.T) { testCHECKMULTISIGBad(t, isR1, false, 3, []int{0, 2}, []int{2, 0}) })
+	t.Run("3_2 duplicate sig", func(t *testing.T) { testCHECKMULTISIGBad(t, isR1, false, 3, nil, []int{0, 0}) })
+	t.Run("1_2 too many signatures", func(t *testing.T) { testCHECKMULTISIGBad(t, isR1, true, 2, []int{0}, []int{0, 1}) })
 	t.Run("gas limit exceeded", func(t *testing.T) {
-		v := initCHECKMULTISIGVM(t, 1, []int{0}, []int{0})
+		v := initCHECKMULTISIGVM(t, isR1, 1, []int{0}, []int{0})
 		v.GasLimit = ECDSAVerifyPrice - 1
 		require.Error(t, v.Run())
 	})
+
+	msg := []byte("NEO - An Open Network For Smart Economy")
+	pubs, sigs, _, err := initCHECKMULTISIG(isR1, msg, 1)
+	require.NoError(t, err)
+	arr := stackitem.NewArray([]stackitem.Item{stackitem.NewArray(nil)})
+
+	t.Run("invalid message type", func(t *testing.T) {
+		v := initCheckMultisigVMNoArgs(isR1)
+		v.Estack().PushVal(sigs)
+		v.Estack().PushVal(pubs)
+		v.Estack().PushVal(stackitem.NewArray(nil))
+		require.Error(t, v.Run())
+	})
+	t.Run("invalid public keys", func(t *testing.T) {
+		v := initCheckMultisigVMNoArgs(isR1)
+		v.Estack().PushVal(sigs)
+		v.Estack().PushVal(arr)
+		v.Estack().PushVal(msg)
+		require.Error(t, v.Run())
+	})
+	t.Run("invalid signatures", func(t *testing.T) {
+		v := initCheckMultisigVMNoArgs(isR1)
+		v.Estack().PushVal(arr)
+		v.Estack().PushVal(pubs)
+		v.Estack().PushVal(msg)
+		require.Error(t, v.Run())
+	})
 }
diff --git a/pkg/core/interop/crypto/hash_test.go b/pkg/core/interop/crypto/hash_test.go
index 4d87d27d5..313074d4a 100644
--- a/pkg/core/interop/crypto/hash_test.go
+++ b/pkg/core/interop/crypto/hash_test.go
@@ -5,42 +5,65 @@ import (
 	"testing"
 
 	"github.com/nspcc-dev/neo-go/pkg/core/interop"
-	"github.com/nspcc-dev/neo-go/pkg/core/interop/interopnames"
-	"github.com/nspcc-dev/neo-go/pkg/io"
-	"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
-	"github.com/nspcc-dev/neo-go/pkg/vm/emit"
-	"github.com/stretchr/testify/assert"
+	"github.com/nspcc-dev/neo-go/pkg/crypto"
+	"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
+	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/vm"
+	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
 	"github.com/stretchr/testify/require"
 )
 
+type testVerifiable []byte
+
+var _ crypto.Verifiable = testVerifiable{}
+
+func (v testVerifiable) GetSignedPart() []byte {
+	return v
+}
+func (v testVerifiable) GetSignedHash() util.Uint256 {
+	return hash.Sha256(v)
+}
+
+func testHash0100(t *testing.T, result string, interopFunc func(*interop.Context) error) {
+	t.Run("good", func(t *testing.T) {
+		bs := []byte{1, 0}
+
+		checkGood := func(t *testing.T, ic *interop.Context) {
+			require.NoError(t, interopFunc(ic))
+			require.Equal(t, 1, ic.VM.Estack().Len())
+			require.Equal(t, result, hex.EncodeToString(ic.VM.Estack().Pop().Bytes()))
+		}
+		t.Run("raw bytes", func(t *testing.T) {
+			ic := &interop.Context{VM: vm.New()}
+			ic.VM.Estack().PushVal(bs)
+			checkGood(t, ic)
+		})
+		t.Run("interop", func(t *testing.T) {
+			ic := &interop.Context{VM: vm.New()}
+			ic.VM.Estack().PushVal(stackitem.NewInterop(testVerifiable(bs)))
+			checkGood(t, ic)
+		})
+		t.Run("container", func(t *testing.T) {
+			ic := &interop.Context{VM: vm.New(), Container: testVerifiable(bs)}
+			ic.VM.Estack().PushVal(stackitem.Null{})
+			checkGood(t, ic)
+		})
+	})
+	t.Run("bad message", func(t *testing.T) {
+		ic := &interop.Context{VM: vm.New()}
+		ic.VM.Estack().PushVal(stackitem.NewArray(nil))
+		require.Error(t, interopFunc(ic))
+	})
+}
+
 func TestSHA256(t *testing.T) {
 	// 0x0100 hashes to 47dc540c94ceb704a23875c11273e16bb0b8a87aed84de911f2133568115f254
 	res := "47dc540c94ceb704a23875c11273e16bb0b8a87aed84de911f2133568115f254"
-	buf := io.NewBufBinWriter()
-	emit.Bytes(buf.BinWriter, []byte{1, 0})
-	emit.Syscall(buf.BinWriter, interopnames.NeoCryptoSHA256)
-	prog := buf.Bytes()
-	ic := &interop.Context{Trigger: trigger.Verification}
-	Register(ic)
-	v := ic.SpawnVM()
-	v.Load(prog)
-	require.NoError(t, v.Run())
-	assert.Equal(t, 1, v.Estack().Len())
-	assert.Equal(t, res, hex.EncodeToString(v.Estack().Pop().Bytes()))
+	testHash0100(t, res, Sha256)
 }
 
 func TestRIPEMD160(t *testing.T) {
 	// 0x0100 hashes to 213492c0c6fc5d61497cf17249dd31cd9964b8a3
 	res := "213492c0c6fc5d61497cf17249dd31cd9964b8a3"
-	buf := io.NewBufBinWriter()
-	emit.Bytes(buf.BinWriter, []byte{1, 0})
-	emit.Syscall(buf.BinWriter, interopnames.NeoCryptoRIPEMD160)
-	prog := buf.Bytes()
-	ic := &interop.Context{Trigger: trigger.Verification}
-	Register(ic)
-	v := ic.SpawnVM()
-	v.Load(prog)
-	require.NoError(t, v.Run())
-	assert.Equal(t, 1, v.Estack().Len())
-	assert.Equal(t, res, hex.EncodeToString(v.Estack().Pop().Bytes()))
+	testHash0100(t, res, RipeMD160)
 }
diff --git a/pkg/core/interop_neo_test.go b/pkg/core/interop_neo_test.go
index 5f4462db4..5366e4d91 100644
--- a/pkg/core/interop_neo_test.go
+++ b/pkg/core/interop_neo_test.go
@@ -1,21 +1,18 @@
 package core
 
 import (
-	"fmt"
 	"testing"
 
 	"github.com/nspcc-dev/neo-go/pkg/config/netmode"
 	"github.com/nspcc-dev/neo-go/pkg/core/block"
 	"github.com/nspcc-dev/neo-go/pkg/core/dao"
 	"github.com/nspcc-dev/neo-go/pkg/core/interop"
-	"github.com/nspcc-dev/neo-go/pkg/core/interop/crypto"
 	"github.com/nspcc-dev/neo-go/pkg/core/interop/enumerator"
 	"github.com/nspcc-dev/neo-go/pkg/core/interop/iterator"
 	"github.com/nspcc-dev/neo-go/pkg/core/state"
 	"github.com/nspcc-dev/neo-go/pkg/core/storage"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
-	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
 	"github.com/nspcc-dev/neo-go/pkg/util"
@@ -129,88 +126,6 @@ func TestStorageFind(t *testing.T) {
 	})
 }
 
-func TestECDSAVerify(t *testing.T) {
-	priv, err := keys.NewPrivateKey()
-	require.NoError(t, err)
-
-	chain := newTestChain(t)
-	defer chain.Close()
-
-	ic := chain.newInteropContext(trigger.Application, dao.NewSimple(storage.NewMemoryStore(), netmode.UnitTestNet, false), nil, nil)
-	runCase := func(t *testing.T, isErr bool, result interface{}, args ...interface{}) {
-		ic.SpawnVM()
-		for i := range args {
-			ic.VM.Estack().PushVal(args[i])
-		}
-
-		var err error
-		func() {
-			defer func() {
-				if r := recover(); r != nil {
-					err = fmt.Errorf("panic: %v", r)
-				}
-			}()
-			err = crypto.ECDSASecp256r1Verify(ic)
-		}()
-
-		if isErr {
-			require.Error(t, err)
-			return
-		}
-		require.NoError(t, err)
-		require.Equal(t, 1, ic.VM.Estack().Len())
-		require.Equal(t, result, ic.VM.Estack().Pop().Value().(bool))
-	}
-
-	msg := []byte("test message")
-
-	t.Run("success", func(t *testing.T) {
-		sign := priv.Sign(msg)
-		runCase(t, false, true, sign, priv.PublicKey().Bytes(), msg)
-	})
-
-	t.Run("signed interop item", func(t *testing.T) {
-		tx := transaction.New(netmode.UnitTestNet, []byte{0, 1, 2}, 1)
-		msg := tx.GetSignedPart()
-		sign := priv.Sign(msg)
-		runCase(t, false, true, sign, priv.PublicKey().Bytes(), stackitem.NewInterop(tx))
-	})
-
-	t.Run("signed script container", func(t *testing.T) {
-		tx := transaction.New(netmode.UnitTestNet, []byte{0, 1, 2}, 1)
-		msg := tx.GetSignedPart()
-		sign := priv.Sign(msg)
-		ic.Container = tx
-		runCase(t, false, true, sign, priv.PublicKey().Bytes(), stackitem.Null{})
-	})
-
-	t.Run("missing arguments", func(t *testing.T) {
-		runCase(t, true, false)
-		sign := priv.Sign(msg)
-		runCase(t, true, false, sign)
-		runCase(t, true, false, sign, priv.PublicKey().Bytes())
-	})
-
-	t.Run("invalid signature", func(t *testing.T) {
-		sign := priv.Sign(msg)
-		sign[0] = ^sign[0]
-		runCase(t, false, false, sign, priv.PublicKey().Bytes(), msg)
-	})
-
-	t.Run("invalid public key", func(t *testing.T) {
-		sign := priv.Sign(msg)
-		pub := priv.PublicKey().Bytes()
-		pub[0] = 0xFF // invalid prefix
-		runCase(t, true, false, sign, pub, msg)
-	})
-
-	t.Run("invalid message", func(t *testing.T) {
-		sign := priv.Sign(msg)
-		runCase(t, true, false, sign, priv.PublicKey().Bytes(),
-			stackitem.NewArray([]stackitem.Item{stackitem.NewByteArray(msg)}))
-	})
-}
-
 // Helper functions to create VM, InteropContext, TX, Account, Contract.
 
 func createVM(t *testing.T) (*vm.VM, *interop.Context, *Blockchain) {