diff --git a/packages/amino/src/wallet.spec.ts b/packages/amino/src/wallet.spec.ts
new file mode 100644
index 0000000000..bc6c0868f6
--- /dev/null
+++ b/packages/amino/src/wallet.spec.ts
@@ -0,0 +1,109 @@
+import { fromHex } from "@cosmjs/encoding";
+
+import { decrypt, encrypt, executeKdf, KdfConfiguration } from "./wallet";
+
+describe("wallet", () => {
+  describe("executeKdf", () => {
+    describe("with supported algorithm", () => {
+      it("can execute", async () => {
+        const password = "123";
+        const kdfConfiguration: KdfConfiguration = {
+          algorithm: "argon2id",
+          params: {
+            outputLength: 32,
+            opsLimit: 4,
+            memLimitKib: 3 * 1024,
+          },
+        };
+        await expectAsync(executeKdf(password, kdfConfiguration)).not.toBeRejected();
+      });
+
+      describe("with invalid params", () => {
+        it("throws", async () => {
+          const password = "123";
+          const kdfConfiguration: KdfConfiguration = {
+            algorithm: "argon2id",
+            params: {
+              outputLength: "invalid",
+              opsLimit: "invalid",
+              memLimitKib: "invalid",
+            },
+          };
+          await expectAsync(executeKdf(password, kdfConfiguration)).toBeRejectedWith(
+            new Error("Invalid format of argon2id params"),
+          );
+        });
+      });
+    });
+
+    describe("with unsupported algorithm", () => {
+      it("throws", async () => {
+        const password = "123";
+        const kdfConfiguration: KdfConfiguration = {
+          algorithm: "unsupported",
+          params: {},
+        };
+        await expectAsync(executeKdf(password, kdfConfiguration)).toBeRejectedWith(
+          new Error("Unsupported KDF algorithm"),
+        );
+      });
+    });
+  });
+
+  describe("encrypt", () => {
+    describe("with supported algorithm", () => {
+      it("can encrypt without throw", async () => {
+        const plaintext = new Uint8Array([0x11, 0x22, 0x33, 0x44]);
+        const encryptionKey = fromHex("1324cdddc4b94e625bbabcac862c9429ba011e2184a1ccad60e7c3f6ff4916d8");
+        const encryptionConfiguration = {
+          algorithm: "xchacha20poly1305-ietf",
+          params: {},
+        };
+        await expectAsync(encrypt(plaintext, encryptionKey, encryptionConfiguration)).not.toBeRejected();
+      });
+    });
+
+    describe("with unsupported algorithm", () => {
+      it("throws", async () => {
+        const plaintext = new Uint8Array([0x11, 0x22, 0x33, 0x44]);
+        const encryptionKey = fromHex("1324cdddc4b94e625bbabcac862c9429ba011e2184a1ccad60e7c3f6ff4916d8");
+        const encryptionConfiguration = {
+          algorithm: "unsupported",
+          params: {},
+        };
+        await expectAsync(encrypt(plaintext, encryptionKey, encryptionConfiguration)).toBeRejectedWith(
+          new Error("Unsupported encryption algorithm: 'unsupported'"),
+        );
+      });
+    });
+  });
+
+  describe("decrypt", () => {
+    const plaintext = new Uint8Array([0x11, 0x22, 0x33, 0x44]);
+    const encryptionKey = fromHex("1324cdddc4b94e625bbabcac862c9429ba011e2184a1ccad60e7c3f6ff4916d8");
+    const encryptionConfiguration = {
+      algorithm: "xchacha20poly1305-ietf",
+      params: {},
+    };
+
+    describe("with supported algorithm", () => {
+      it("can decrypt without throw", async () => {
+        const ciphertext = await encrypt(plaintext, encryptionKey, encryptionConfiguration);
+        await decrypt(ciphertext, encryptionKey, encryptionConfiguration);
+        await expectAsync(decrypt(ciphertext, encryptionKey, encryptionConfiguration)).not.toBeRejected();
+      });
+    });
+
+    describe("with unsupported algorithm", () => {
+      it("throws", async () => {
+        const ciphertext = await encrypt(plaintext, encryptionKey, encryptionConfiguration);
+        await expectAsync(
+          decrypt(ciphertext, encryptionKey, {
+            algorithm: "unsupported",
+            params: {},
+          }),
+        ).toBeRejectedWith(new Error("Unsupported encryption algorithm: 'unsupported'"));
+      });
+    });
+  });
+});