diff --git a/codec/std/msgs_test.go b/codec/std/msgs_test.go
new file mode 100644
index 000000000..bd3063ecb
--- /dev/null
+++ b/codec/std/msgs_test.go
@@ -0,0 +1,46 @@
+package std_test
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/cosmos/cosmos-sdk/codec/std"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/x/evidence"
+	"github.com/cosmos/cosmos-sdk/x/gov"
+)
+
+type BadEvidence struct {
+	*std.Evidence_Equivocation
+}
+
+func TestNewMsgSubmitEvidence(t *testing.T) {
+	s := sdk.AccAddress("foo")
+	e := evidence.Equivocation{
+		Height:           100,
+		Time:             time.Now().UTC(),
+		Power:            40000000000,
+		ConsensusAddress: sdk.ConsAddress("test"),
+	}
+
+	msg, err := std.NewMsgSubmitEvidence(e, s)
+	require.NoError(t, err)
+	require.Equal(t, msg.GetEvidence(), &e)
+	require.Equal(t, msg.GetSubmitter(), s)
+	require.NoError(t, msg.ValidateBasic())
+}
+
+func TestNewNewMsgSubmitProposal(t *testing.T) {
+	p := sdk.AccAddress("foo")
+	d := sdk.NewCoins(sdk.NewInt64Coin("stake", 1000))
+	c := gov.TextProposal{Title: "title", Description: "description"}
+
+	msg, err := std.NewMsgSubmitProposal(c, d, p)
+	require.NoError(t, err)
+	require.Equal(t, msg.GetContent(), &c)
+	require.Equal(t, msg.GetProposer(), p)
+	require.Equal(t, msg.GetInitialDeposit(), d)
+	require.NoError(t, msg.ValidateBasic())
+}