diff --git a/libs/ledger-live-common/src/families/aptos/signOperation.test.ts b/libs/ledger-live-common/src/families/aptos/signOperation.test.ts
new file mode 100644
index 000000000000..e7480585bedc
--- /dev/null
+++ b/libs/ledger-live-common/src/families/aptos/signOperation.test.ts
@@ -0,0 +1,186 @@
+import { Observable } from "rxjs";
+import { createFixtureAccount } from "../../mock/fixtures/cryptoCurrencies";
+import createTransaction from "./createTransaction";
+import signOperation from "./signOperation";
+import BigNumber from "bignumber.js";
+
+jest.mock("./api", () => {
+  return {
+    AptosAPI: function () {
+      return {
+        generateTransaction: jest.fn(() => "tx"),
+      };
+    },
+  };
+});
+
+let signTransaction;
+
+jest.mock("./LedgerAccount", () => {
+  return function () {
+    return {
+      init: jest.fn(),
+      signTransaction,
+    };
+  };
+});
+
+jest.mock("../../hw/deviceAccess", () => {
+  return {
+    withDevice: jest.fn(() => observable => {
+      return observable(new Observable());
+    }),
+  };
+});
+
+jest.mock("../../operation", () => {
+  return {
+    encodeOperationId: jest.fn(() => "js:2:aptos:0x000"),
+  };
+});
+
+jest.mock("./buildTransaction", () => {
+  return function () {
+    return {
+      sequence_number: "789",
+    };
+  };
+});
+
+describe("signOperation Test", () => {
+  beforeEach(() => {
+    signTransaction = jest.fn(() => "tx");
+  });
+
+  it("should thrown an error", async () => {
+    signTransaction = () => {
+      throw new Error("observable-catch-error");
+    };
+
+    const account = createFixtureAccount();
+    const transaction = createTransaction();
+
+    account.id = "js:2:aptos:0x000:";
+    transaction.mode = "send";
+
+    const observable = await signOperation({
+      account,
+      deviceId: "1",
+      transaction,
+    });
+
+    observable.subscribe({
+      error: err => {
+        expect(err.message).toBe("observable-catch-error");
+      },
+    });
+  });
+
+  it("should return 3 operations", async () => {
+    const date = new Date("2020-01-01");
+    jest.useFakeTimers().setSystemTime(date);
+
+    const account = createFixtureAccount();
+    const transaction = createTransaction();
+
+    account.id = "js:2:aptos:0x000:";
+    transaction.mode = "send";
+
+    const observable = await signOperation({
+      account,
+      deviceId: "1",
+      transaction,
+    });
+
+    expect(observable).toBeInstanceOf(Observable);
+
+    const expectedValues = [
+      { type: "device-signature-requested" },
+      { type: "device-signature-granted" },
+      {
+        type: "signed",
+        signedOperation: {
+          operation: {
+            id: "js:2:aptos:0x000",
+            hash: "",
+            type: "OUT",
+            value: new BigNumber(0),
+            fee: new BigNumber(0),
+            extra: {},
+            blockHash: null,
+            blockHeight: null,
+            senders: [account.freshAddress],
+            recipients: [transaction.recipient],
+            accountId: "js:2:aptos:0x000:",
+            date,
+            transactionSequenceNumber: 789,
+          },
+          signature: "7478",
+        },
+      },
+    ];
+
+    let i = 0;
+
+    observable.forEach(signOperationEvent => {
+      expect(signOperationEvent).toEqual(expectedValues[i]);
+      i++;
+    });
+  });
+
+  it("should return 3 operations with all amount", async () => {
+    const date = new Date("2020-01-01");
+    jest.useFakeTimers().setSystemTime(date);
+
+    const account = createFixtureAccount();
+    const transaction = createTransaction();
+
+    account.balance = new BigNumber(40);
+    transaction.fees = new BigNumber(30);
+    transaction.useAllAmount = true;
+
+    account.id = "js:2:aptos:0x000:";
+    transaction.mode = "send";
+
+    const observable = await signOperation({
+      account,
+      deviceId: "1",
+      transaction,
+    });
+
+    expect(observable).toBeInstanceOf(Observable);
+
+    const expectedValues = [
+      { type: "device-signature-requested" },
+      { type: "device-signature-granted" },
+      {
+        type: "signed",
+        signedOperation: {
+          operation: {
+            id: "js:2:aptos:0x000",
+            hash: "",
+            type: "OUT",
+            value: new BigNumber(10),
+            fee: transaction.fees,
+            extra: {},
+            blockHash: null,
+            blockHeight: null,
+            senders: [account.freshAddress],
+            recipients: [transaction.recipient],
+            accountId: "js:2:aptos:0x000:",
+            date,
+            transactionSequenceNumber: 789,
+          },
+          signature: "7478",
+        },
+      },
+    ];
+
+    let i = 0;
+
+    observable.forEach(signOperationEvent => {
+      expect(signOperationEvent).toEqual(expectedValues[i]);
+      i++;
+    });
+  });
+});