diff --git a/core/__tests__/app/lib/password-gen.jest.js b/core/__tests__/app/lib/password-gen.jest.js
new file mode 100644
index 00000000..e18a96e3
--- /dev/null
+++ b/core/__tests__/app/lib/password-gen.jest.js
@@ -0,0 +1,22 @@
+"use_strict";
+const { generateOTP } = require("../../../lib/password_gen.js");
+
+describe("Generating OTPs", () => {
+  it("should generate an OTP of 6 characters", () => {
+    const generatedOTP = generateOTP(6);
+
+    expect(generatedOTP).toHaveLength(6);
+  });
+
+  it("should generate an OTP of 100 characters", () => {
+    const generatedOTP = generateOTP(100);
+
+    expect(generatedOTP).toHaveLength(100);
+  });
+
+  it("should return an empty string when passed a negative number", () => {
+    const generatedOTP = generateOTP(-42);
+
+    expect(generatedOTP).toBe("");
+  });
+});