diff --git a/types/tx/types_test.go b/types/tx/types_test.go
new file mode 100644
index 0000000000..14b6274f27
--- /dev/null
+++ b/types/tx/types_test.go
@@ -0,0 +1,226 @@
+package tx
+
+import (
+	"encoding/hex"
+	"testing"
+
+	"github.com/cosmos/gogoproto/proto"
+	types2 "github.com/cosmos/gogoproto/types/any"
+	"github.com/stretchr/testify/require"
+
+	"cosmossdk.io/math"
+	"cosmossdk.io/x/tx/signing"
+
+	"github.com/cosmos/cosmos-sdk/codec"
+	"github.com/cosmos/cosmos-sdk/codec/address"
+	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+func TestTx_GetMsgs(t *testing.T) {
+	any1, err := types2.NewAnyWithCacheWithValue(&DummyProtoMessage1{})
+	require.Nil(t, err)
+	any2, err := types2.NewAnyWithCacheWithValue(&DummyProtoMessage2{})
+	require.Nil(t, err)
+
+	cases := []struct {
+		name     string
+		msgs     []*types2.Any
+		expected []sdk.Msg
+		expPanic bool
+	}{
+		{
+			name:     "Tx with one message",
+			msgs:     []*types2.Any{any1},
+			expected: []sdk.Msg{&DummyProtoMessage1{}},
+			expPanic: false,
+		},
+		{
+			name:     "Tx with messages of the same type",
+			msgs:     []*types2.Any{any1, any1},
+			expected: []sdk.Msg{&DummyProtoMessage1{}, &DummyProtoMessage1{}},
+			expPanic: false,
+		},
+		{
+			name:     "Tx with messages with different type",
+			msgs:     []*types2.Any{any1, any2},
+			expected: []sdk.Msg{&DummyProtoMessage1{}, &DummyProtoMessage2{}},
+			expPanic: false,
+		},
+		{
+			name:     "Tx without uncached messages",
+			msgs:     []*types2.Any{{}},
+			expPanic: true,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			transaction := Tx{
+				Body: &TxBody{
+					Messages: tc.msgs,
+				},
+			}
+
+			if tc.expPanic {
+				require.Panics(t, func() {
+					transaction.GetMsgs()
+				})
+				return
+			}
+			actual := transaction.GetMsgs()
+			require.Equal(t, tc.expected, actual)
+		})
+	}
+}
+
+func TestTx_ValidateBasic(t *testing.T) {
+	cases := []struct {
+		name        string
+		transaction *Tx
+		expErr      bool
+	}{
+		{
+			name:        "Tx is nil",
+			transaction: nil,
+			expErr:      true,
+		},
+		{
+			name:        "Tx without body",
+			transaction: &Tx{},
+			expErr:      true,
+		},
+		{
+			name:        "Tx without AuthInfo",
+			transaction: &Tx{Body: &TxBody{}},
+			expErr:      true,
+		},
+		{
+			name:        "Tx without Fee",
+			transaction: &Tx{Body: &TxBody{}, AuthInfo: &AuthInfo{}},
+			expErr:      true,
+		},
+		{
+			name:        "Tx with gas limit greater than Max gas wanted",
+			transaction: &Tx{Body: &TxBody{}, AuthInfo: &AuthInfo{Fee: &Fee{GasLimit: MaxGasWanted + 1}}},
+			expErr:      true,
+		},
+		{
+			name:        "Tx without Fee Amount",
+			transaction: &Tx{Body: &TxBody{}, AuthInfo: &AuthInfo{Fee: &Fee{GasLimit: MaxGasWanted}}},
+			expErr:      true,
+		},
+		{
+			name: "Tx with negative Fee Amount",
+			transaction: &Tx{
+				Body: &TxBody{},
+				AuthInfo: &AuthInfo{
+					Fee: &Fee{GasLimit: MaxGasWanted, Amount: sdk.Coins{sdk.Coin{Amount: math.NewInt(-1)}}},
+				},
+			},
+			expErr: true,
+		},
+		{
+			name: "Tx with invalid fee payer address",
+			transaction: &Tx{
+				Body: &TxBody{},
+				AuthInfo: &AuthInfo{
+					Fee: &Fee{
+						GasLimit: MaxGasWanted,
+						Payer:    "invalidPayerAddress",
+						Amount:   sdk.Coins{sdk.NewCoin("aaa", math.NewInt(10))},
+					},
+				},
+			},
+			expErr: true,
+		},
+		{
+			name: "Tx without signature",
+			transaction: &Tx{
+				Body: &TxBody{},
+				AuthInfo: &AuthInfo{
+					Fee: &Fee{
+						GasLimit: MaxGasWanted,
+						Payer:    "cosmos1ulav3hsenupswqfkw2y3sup5kgtqwnvqa8eyhs",
+						Amount:   sdk.Coins{sdk.NewCoin("aaa", math.NewInt(11))},
+					},
+				},
+			},
+			expErr: true,
+		},
+		{
+			name: "Tx is valid",
+			transaction: &Tx{
+				Body: &TxBody{},
+				AuthInfo: &AuthInfo{
+					Fee: &Fee{
+						GasLimit: MaxGasWanted,
+						Payer:    "cosmos1ulav3hsenupswqfkw2y3sup5kgtqwnvqa8eyhs",
+						Amount:   sdk.Coins{sdk.NewCoin("aaa", math.NewInt(11))},
+					},
+				},
+				Signatures: [][]byte{[]byte("signature")},
+			},
+			expErr: false,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			err := tc.transaction.ValidateBasic()
+			require.Equal(t, tc.expErr, err != nil)
+		})
+	}
+}
+
+func TestTx_GetSigners(t *testing.T) {
+	transaction := &Tx{
+		Body: &TxBody{},
+		AuthInfo: &AuthInfo{
+			Fee: &Fee{
+				GasLimit: MaxGasWanted,
+				Payer:    "cosmos1ulav3hsenupswqfkw2y3sup5kgtqwnvqa8eyhs",
+				Amount:   sdk.Coins{sdk.NewCoin("aaa", math.NewInt(11))},
+			},
+		},
+		Signatures: [][]byte{[]byte("signature")},
+	}
+
+	addrCdc := address.NewBech32Codec("cosmos")
+	options := codectypes.InterfaceRegistryOptions{
+		ProtoFiles: proto.HybridResolver,
+		SigningOptions: signing.Options{
+			AddressCodec:          addrCdc,
+			ValidatorAddressCodec: dummyAddressCodec{},
+		},
+	}
+	ir, err := codectypes.NewInterfaceRegistryWithOptions(options)
+	require.Nil(t, err)
+	cdc := codec.NewProtoCodec(ir)
+	b, _, err := transaction.GetSigners(cdc)
+	require.Nil(t, err)
+
+	expect := "cosmos1ulav3hsenupswqfkw2y3sup5kgtqwnvqa8eyhs"
+	actual, err := addrCdc.BytesToString(b[0])
+	require.Equal(t, expect, actual)
+	require.Nil(t, err)
+}
+
+type DummyProtoMessage1 struct{}
+
+func (d *DummyProtoMessage1) Reset()         {}
+func (d *DummyProtoMessage1) String() string { return "/dummy.proto.message1" }
+func (d *DummyProtoMessage1) ProtoMessage()  {}
+
+type DummyProtoMessage2 struct{}
+
+func (d *DummyProtoMessage2) Reset()         {}
+func (d *DummyProtoMessage2) String() string { return "/dummy.proto.message2" }
+func (d *DummyProtoMessage2) ProtoMessage()  {}
+
+type dummyAddressCodec struct{}
+
+func (d dummyAddressCodec) StringToBytes(text string) ([]byte, error) { return hex.DecodeString(text) }
+func (d dummyAddressCodec) BytesToString(bz []byte) (string, error) {
+	return hex.EncodeToString(bz), nil
+}