diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9b0b1e4f7..9ff356795 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -51,6 +51,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Improvements
 
+- [#767](https://github.com/alleslabs/celatone-frontend/pull/767) Add test validation for Fee.ts
 - [#756](https://github.com/alleslabs/celatone-frontend/pull/756) Redirect usei to homepage
 - [#750](https://github.com/alleslabs/celatone-frontend/pull/750) api v1 - recent codes list
 - [#752](https://github.com/alleslabs/celatone-frontend/pull/752) Support contract state's key as base64
diff --git a/src/lib/utils/fee.test.ts b/src/lib/utils/fee.test.ts
new file mode 100644
index 000000000..01c950d14
--- /dev/null
+++ b/src/lib/utils/fee.test.ts
@@ -0,0 +1,30 @@
+import { feeFromStr } from "./fee";
+
+describe("fee validation", () => {
+  test("standard case", () => {
+    const fee = feeFromStr("10000uosmo");
+
+    expect(fee).toEqual({
+      amount: [{ denom: "uosmo", amount: "10000" }],
+      gas: "0",
+    });
+  });
+
+  test("undefined input handling", () => {
+    const fee = feeFromStr(undefined);
+
+    expect(fee).toBeUndefined();
+  });
+
+  test("multiple coin types", () => {
+    const fee = feeFromStr("10000uosmo,89999ustake");
+
+    expect(fee).toEqual({
+      amount: [
+        { denom: "uosmo", amount: "10000" },
+        { denom: "ustake", amount: "89999" },
+      ],
+      gas: "0",
+    });
+  });
+});