diff --git a/packages/stargate/src/modules/vesting/aminomessages.spec.ts b/packages/stargate/src/modules/vesting/aminomessages.spec.ts
new file mode 100644
index 00000000..a498efcc
--- /dev/null
+++ b/packages/stargate/src/modules/vesting/aminomessages.spec.ts
@@ -0,0 +1,63 @@
+/* eslint-disable @typescript-eslint/naming-convention */
+import { AminoMsg, coins } from "@cosmjs/amino";
+import { MsgCreateVestingAccount } from "cosmjs-types/cosmos/vesting/v1beta1/tx";
+import Long from "long";
+
+import { AminoTypes } from "../../aminotypes";
+import { AminoMsgCreateVestingAccount, createVestingAminoConverters } from "./aminomessages";
+
+describe("AminoTypes", () => {
+  describe("toAmino", () => {
+    it("works for MsgCreateVestingAccount", () => {
+      const msg: MsgCreateVestingAccount = {
+        fromAddress: "cosmos1pkptre7fdkl6gfrzlesjjvhxhlc3r4gmmk8rs6",
+        toAddress: "cosmos10dyr9899g6t0pelew4nvf4j5c3jcgv0r73qga5",
+        amount: coins(1234, "utest"),
+        endTime: Long.fromString("1838718434"),
+        delayed: true,
+      };
+      const aminoTypes = new AminoTypes(createVestingAminoConverters());
+      const aminoMsg = aminoTypes.toAmino({
+        typeUrl: "/cosmos.vesting.v1beta1.MsgCreateVestingAccount",
+        value: msg,
+      });
+      const expected: AminoMsgCreateVestingAccount = {
+        type: "cosmos-sdk/MsgCreateVestingAccount",
+        value: {
+          from_address: "cosmos1pkptre7fdkl6gfrzlesjjvhxhlc3r4gmmk8rs6",
+          to_address: "cosmos10dyr9899g6t0pelew4nvf4j5c3jcgv0r73qga5",
+          amount: coins(1234, "utest"),
+          end_time: "1838718434",
+          delayed: true,
+        },
+      };
+      expect(aminoMsg).toEqual(expected);
+    });
+  });
+  describe("fromAmino", () => {
+    it("works for MsgCreateVestingAccount", () => {
+      const aminoMsg: AminoMsgCreateVestingAccount = {
+        type: "cosmos-sdk/MsgCreateVestingAccount",
+        value: {
+          from_address: "cosmos1pkptre7fdkl6gfrzlesjjvhxhlc3r4gmmk8rs6",
+          to_address: "cosmos10dyr9899g6t0pelew4nvf4j5c3jcgv0r73qga5",
+          amount: coins(1234, "utest"),
+          end_time: "1838718434",
+          delayed: true,
+        },
+      };
+      const msg = new AminoTypes(createVestingAminoConverters()).fromAmino(aminoMsg);
+      const expectedValue: MsgCreateVestingAccount = {
+        fromAddress: "cosmos1pkptre7fdkl6gfrzlesjjvhxhlc3r4gmmk8rs6",
+        toAddress: "cosmos10dyr9899g6t0pelew4nvf4j5c3jcgv0r73qga5",
+        amount: coins(1234, "utest"),
+        endTime: Long.fromString("1838718434"),
+        delayed: true,
+      };
+      expect(msg).toEqual({
+        typeUrl: "/cosmos.vesting.v1beta1.MsgCreateVestingAccount",
+        value: expectedValue,
+      });
+    });
+  });
+});