diff --git a/test/test_verify.js b/test/test_verify.js
new file mode 100644
index 0000000..13a0929
--- /dev/null
+++ b/test/test_verify.js
@@ -0,0 +1,207 @@
+const jwt = require("jsonwebtoken");
+const chai = require("chai");
+
+const expect = chai.expect;
+
+const PAYLOAD = "myToken";
+const SECRETKEY = "secretKey";
+const PAYLOADOBJ = {
+  token: "myToken",
+};
+describe("Array", function () {
+  it("1T-2-3T-4", function (done) {
+    const token = jwt.sign(PAYLOAD, SECRETKEY);
+    const decodedToken = jwt.verify(
+      token,
+      SECRETKEY,
+      {
+        clockTimestamp: "aaa",
+      },
+      (err, decoded) => {
+        if (err) {
+          console.log("FAIL");
+          expect(err.message).to.equal("clockTimestamp must be a number");
+          done();
+        } else {
+          console.log("SUCCESS");
+          expect(decoded).to.equal(PAYLOAD);
+          done();
+        }
+      }
+    );
+  });
+
+  it("1T-2-3F-5T-6", function (done) {
+    const token = jwt.sign(PAYLOAD, SECRETKEY);
+    const decodedToken = jwt.verify(
+      token,
+      SECRETKEY,
+      {
+        clockTimestamp: 2000,
+        nonce: null,
+      },
+      (err, decoded) => {
+        if (err) {
+          console.log("FAIL");
+          expect(err.message).to.equal("nonce must be a non-empty string");
+          done();
+        } else {
+          console.log("SUCCESS");
+          expect(decoded).to.equal(PAYLOAD);
+          done();
+        }
+      }
+    );
+  });
+
+  it("1F-3F-5F-7T-8", function (done) {
+    const token = jwt.sign(PAYLOAD, SECRETKEY);
+    const decodedToken = jwt.verify(
+      null,
+      SECRETKEY,
+      {
+        clockTimestamp: 2000,
+      },
+      (err, decoded) => {
+        if (err) {
+          console.log("FAIL");
+          expect(err.message).to.equal("jwt must be provided");
+          done();
+        } else {
+          console.log("SUCCESS");
+          expect(decoded).to.equal(PAYLOAD);
+          done();
+        }
+      }
+    );
+  });
+
+  it("1T-2-3F-5F-7F-9T-10", function (done) {
+    const token = jwt.sign(PAYLOAD, SECRETKEY);
+    const decodedToken = jwt.verify(
+      {
+        name: "test",
+      },
+      SECRETKEY,
+      {
+        clockTimestamp: 2000,
+      },
+      (err, decoded) => {
+        if (err) {
+          console.log("FAIL");
+          expect(err.message).to.equal("jwt must be a string");
+          done();
+        } else {
+          console.log("SUCCESS");
+          expect(decoded).to.equal(PAYLOAD);
+          done();
+        }
+      }
+    );
+  });
+
+  it("1F-3F-5F-7F-9F-11-12T-13", function (done) {
+    const token = jwt.sign(PAYLOAD, SECRETKEY);
+    const decodedToken = jwt.verify(
+      "invalidToken",
+      SECRETKEY,
+      {
+        clockTimestamp: 2000,
+      },
+      (err, decoded) => {
+        if (err) {
+          console.log("FAIL");
+          expect(err.message).to.equal("jwt malformed");
+          done();
+        } else {
+          console.log("SUCCESS");
+          expect(decoded).to.equal(PAYLOAD);
+          done();
+        }
+      }
+    );
+  });
+
+  it("1F-3F-5F-7F-9F-11-12F-14-15T-16", function (done) {
+    const token = jwt.sign(PAYLOAD, SECRETKEY);
+    const decodedToken = jwt.verify(
+      token,
+      "invalidSecretkey",
+      {
+        clockTimestamp: 2000,
+      },
+      (err, decoded) => {
+        if (err) {
+          console.log("FAIL");
+          expect(err.message).to.equal("invalid signature");
+          done();
+        } else {
+          console.log("SUCCESS");
+          expect(decoded).to.equal(PAYLOAD);
+          done();
+        }
+      }
+    );
+  });
+
+  it("1F-3F-5F-7F-9F-11-12F-14-15F-17-18T-19", function (done) {
+    const token = jwt.sign(PAYLOADOBJ, SECRETKEY, {
+      expiresIn: "100ms",
+    });
+
+    // expect("HAHA").to.equal("HAHA");
+    // done();
+
+    setTimeout(() => {
+      const decodedToken = jwt.verify(
+        token,
+        SECRETKEY,
+        {
+          clockTimestamp: Date.now(),
+          clockTolerance: -1000,
+        },
+        (err, decoded) => {
+          if (err) {
+            console.log("FAIL");
+            expect(err.message).to.equal("jwt expired");
+            done();
+          } else {
+            console.log("SUCCESS");
+            expect(decoded.token).to.equal(PAYLOADOBJ.token);
+            done();
+          }
+        }
+      );
+    }, 1500);
+  });
+
+  it("1F-3F-5F-7F-9F-11-12F-14-15F-17-18F-20", function (done) {
+    const token = jwt.sign(PAYLOADOBJ, SECRETKEY, {
+      expiresIn: "100ms",
+    });
+
+    // expect("HAHA").to.equal("HAHA");
+    // done();
+
+    setTimeout(() => {
+      const decodedToken = jwt.verify(
+        token,
+        SECRETKEY,
+        {
+          clockTimestamp: 1000,
+        },
+        (err, decoded) => {
+          if (err) {
+            console.log("FAIL");
+            expect(err.message).to.equal("jwt expired");
+            done();
+          } else {
+            console.log("SUCCESS");
+            expect(decoded.token).to.equal(PAYLOADOBJ.token);
+            done();
+          }
+        }
+      );
+    }, 1500);
+  });
+});