diff --git a/package.json b/package.json
index c39add9..3d50493 100644
--- a/package.json
+++ b/package.json
@@ -33,6 +33,7 @@
     "@stackbuilders/assertive-ts": "^1.4.0",
     "@types/mocha": "^10.0.1",
     "@types/semantic-release": "^20.0.1",
+    "@types/sinon": "^17.0.2",
     "@typescript-eslint/eslint-plugin": "^5.59.8",
     "@typescript-eslint/parser": "^5.59.8",
     "axios-mock-adapter": "^1.21.5",
@@ -44,6 +45,7 @@
     "eslint-plugin-sonarjs": "^0.19.0",
     "mocha": "^10.2.0",
     "semantic-release": "^21.0.7",
+    "sinon": "^17.0.1",
     "ts-node": "^10.9.1",
     "typescript": "^5.1.3"
   }
diff --git a/test/unit/postReleaseCandidate.test.ts b/test/unit/postReleaseCandidate.test.ts
new file mode 100644
index 0000000..4f5175d
--- /dev/null
+++ b/test/unit/postReleaseCandidate.test.ts
@@ -0,0 +1,46 @@
+import { expect } from "@stackbuilders/assertive-ts";
+import axios from "axios";
+import sinon, { SinonStub } from "sinon";
+
+import { CANDIDATES, HACKAGE_PACKAGES_URL, postReleaseCandidate } from "../../src/publish";
+
+const sdistPath = "sdist/path";
+const packageName = "my-hackage-package";
+const hackageToken = "my-fake-token";
+
+describe("postReleaseCandidate", () => {
+  let axiosPostStub: SinonStub;
+
+  beforeEach(() => {
+    axiosPostStub = sinon.stub(axios, "post");
+  });
+
+  afterEach(() => {
+    axiosPostStub.restore();
+  });
+
+  it("returns the status code when request is successful", async () => {
+    axiosPostStub.resolves({ status: 200 });
+
+    const statusCode = await postReleaseCandidate(sdistPath, packageName, hackageToken);
+
+    expect(statusCode).toBeEqual(200);
+    expect(axiosPostStub.calledOnce).toBeTruthy();
+    expect(axiosPostStub.firstCall.args[0]).toBeEqual(`${HACKAGE_PACKAGES_URL}/${packageName}/${CANDIDATES}`);
+  });
+
+  it("throws an error on unsuccessful request", async () => {
+    const errorMsg = "Error message from server";
+    axiosPostStub.rejects({ message: errorMsg });
+
+    try {
+      await postReleaseCandidate(sdistPath, packageName, hackageToken);
+      throw new Error("Function does not throw an error");
+    } catch (error) {
+      expect((error as Error).message).toBeEqual(
+        `You do not have access to POST a file to ${HACKAGE_PACKAGES_URL}/${packageName}/${CANDIDATES}, ${errorMsg}`,
+      );
+      expect(axiosPostStub.calledOnce).toBeTruthy();
+    }
+  });
+});
diff --git a/yarn.lock b/yarn.lock
index 0211eb1..32f5cfe 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -710,6 +710,60 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@sinonjs/commons@npm:^2.0.0":
+  version: 2.0.0
+  resolution: "@sinonjs/commons@npm:2.0.0"
+  dependencies:
+    type-detect: 4.0.8
+  checksum: 5023ba17edf2b85ed58262313b8e9b59e23c6860681a9af0200f239fe939e2b79736d04a260e8270ddd57196851dde3ba754d7230be5c5234e777ae2ca8af137
+  languageName: node
+  linkType: hard
+
+"@sinonjs/commons@npm:^3.0.0":
+  version: 3.0.0
+  resolution: "@sinonjs/commons@npm:3.0.0"
+  dependencies:
+    type-detect: 4.0.8
+  checksum: b4b5b73d4df4560fb8c0c7b38c7ad4aeabedd362f3373859d804c988c725889cde33550e4bcc7cd316a30f5152a2d1d43db71b6d0c38f5feef71fd8d016763f8
+  languageName: node
+  linkType: hard
+
+"@sinonjs/fake-timers@npm:^10.0.2":
+  version: 10.3.0
+  resolution: "@sinonjs/fake-timers@npm:10.3.0"
+  dependencies:
+    "@sinonjs/commons": ^3.0.0
+  checksum: 614d30cb4d5201550c940945d44c9e0b6d64a888ff2cd5b357f95ad6721070d6b8839cd10e15b76bf5e14af0bcc1d8f9ec00d49a46318f1f669a4bec1d7f3148
+  languageName: node
+  linkType: hard
+
+"@sinonjs/fake-timers@npm:^11.2.2":
+  version: 11.2.2
+  resolution: "@sinonjs/fake-timers@npm:11.2.2"
+  dependencies:
+    "@sinonjs/commons": ^3.0.0
+  checksum: 68c29b0e1856fdc280df03ddbf57c726420b78e9f943a241b471edc018fb14ff36fdc1daafd6026cba08c3c7f50c976fb7ae11b88ff44cd7f609692ca7d25158
+  languageName: node
+  linkType: hard
+
+"@sinonjs/samsam@npm:^8.0.0":
+  version: 8.0.0
+  resolution: "@sinonjs/samsam@npm:8.0.0"
+  dependencies:
+    "@sinonjs/commons": ^2.0.0
+    lodash.get: ^4.4.2
+    type-detect: ^4.0.8
+  checksum: 95e40d0bb9f7288e27c379bee1b03c3dc51e7e78b9d5ea6aef66a690da7e81efc4715145b561b449cefc5361a171791e3ce30fb1a46ab247d4c0766024c60a60
+  languageName: node
+  linkType: hard
+
+"@sinonjs/text-encoding@npm:^0.7.1":
+  version: 0.7.2
+  resolution: "@sinonjs/text-encoding@npm:0.7.2"
+  checksum: fe690002a32ba06906cf87e2e8fe84d1590294586f2a7fd180a65355b53660c155c3273d8011a5f2b77209b819aa7306678ae6e4aea0df014bd7ffd4bbbcf1ab
+  languageName: node
+  linkType: hard
+
 "@stackbuilders/assertive-ts@npm:^1.4.0":
   version: 1.4.0
   resolution: "@stackbuilders/assertive-ts@npm:1.4.0"
@@ -727,6 +781,7 @@ __metadata:
     "@stackbuilders/assertive-ts": ^1.4.0
     "@types/mocha": ^10.0.1
     "@types/semantic-release": ^20.0.1
+    "@types/sinon": ^17.0.2
     "@typescript-eslint/eslint-plugin": ^5.59.8
     "@typescript-eslint/parser": ^5.59.8
     axios: ^1.6.0
@@ -739,6 +794,7 @@ __metadata:
     eslint-plugin-sonarjs: ^0.19.0
     mocha: ^10.2.0
     semantic-release: ^21.0.7
+    sinon: ^17.0.1
     ts-node: ^10.9.1
     typescript: ^5.1.3
   languageName: unknown
@@ -861,6 +917,22 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/sinon@npm:^17.0.2":
+  version: 17.0.2
+  resolution: "@types/sinon@npm:17.0.2"
+  dependencies:
+    "@types/sinonjs__fake-timers": "*"
+  checksum: 3a56615f2dc7d0b67d3e4b8ae358df2ff2164d89fabb22e9b46e6afe7d4df844a354ea65d409af9baf29ac0103ea562ab44dd0176405a9cf82a4ff183939f22f
+  languageName: node
+  linkType: hard
+
+"@types/sinonjs__fake-timers@npm:*":
+  version: 8.1.5
+  resolution: "@types/sinonjs__fake-timers@npm:8.1.5"
+  checksum: 7e3c08f6c13df44f3ea7d9a5155ddf77e3f7314c156fa1c5a829a4f3763bafe2f75b1283b887f06e6b4296996a2f299b70f64ff82625f9af5885436e2524d10c
+  languageName: node
+  linkType: hard
+
 "@types/yargs-parser@npm:*":
   version: 21.0.0
   resolution: "@types/yargs-parser@npm:21.0.0"
@@ -3880,6 +3952,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"isarray@npm:0.0.1":
+  version: 0.0.1
+  resolution: "isarray@npm:0.0.1"
+  checksum: 49191f1425681df4a18c2f0f93db3adb85573bcdd6a4482539d98eac9e705d8961317b01175627e860516a2fc45f8f9302db26e5a380a97a520e272e2a40a8d4
+  languageName: node
+  linkType: hard
+
 "isarray@npm:^2.0.5":
   version: 2.0.5
   resolution: "isarray@npm:2.0.5"
@@ -4053,6 +4132,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"just-extend@npm:^4.0.2":
+  version: 4.2.1
+  resolution: "just-extend@npm:4.2.1"
+  checksum: ff9fdede240fad313efeeeb68a660b942e5586d99c0058064c78884894a2690dc09bba44c994ad4e077e45d913fef01a9240c14a72c657b53687ac58de53b39c
+  languageName: node
+  linkType: hard
+
 "kind-of@npm:^6.0.3":
   version: 6.0.3
   resolution: "kind-of@npm:6.0.3"
@@ -4289,6 +4375,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"lodash.get@npm:^4.4.2":
+  version: 4.4.2
+  resolution: "lodash.get@npm:4.4.2"
+  checksum: e403047ddb03181c9d0e92df9556570e2b67e0f0a930fcbbbd779370972368f5568e914f913e93f3b08f6d492abc71e14d4e9b7a18916c31fa04bd2306efe545
+  languageName: node
+  linkType: hard
+
 "lodash.ismatch@npm:^4.4.0":
   version: 4.4.0
   resolution: "lodash.ismatch@npm:4.4.0"
@@ -4774,6 +4867,19 @@ __metadata:
   languageName: node
   linkType: hard
 
+"nise@npm:^5.1.5":
+  version: 5.1.5
+  resolution: "nise@npm:5.1.5"
+  dependencies:
+    "@sinonjs/commons": ^2.0.0
+    "@sinonjs/fake-timers": ^10.0.2
+    "@sinonjs/text-encoding": ^0.7.1
+    just-extend: ^4.0.2
+    path-to-regexp: ^1.7.0
+  checksum: c763dc62c5796cafa5c9268e14a5b34db6e6fa2f1dbc57a891fe5d7ea632a87868e22b5bb34965006f984630793ea11368351e94971163228d9e20b2e88edce8
+  languageName: node
+  linkType: hard
+
 "node-emoji@npm:^1.11.0":
   version: 1.11.0
   resolution: "node-emoji@npm:1.11.0"
@@ -5460,6 +5566,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"path-to-regexp@npm:^1.7.0":
+  version: 1.8.0
+  resolution: "path-to-regexp@npm:1.8.0"
+  dependencies:
+    isarray: 0.0.1
+  checksum: 709f6f083c0552514ef4780cb2e7e4cf49b0cc89a97439f2b7cc69a608982b7690fb5d1720a7473a59806508fc2dae0be751ba49f495ecf89fd8fbc62abccbcd
+  languageName: node
+  linkType: hard
+
 "path-type@npm:^4.0.0":
   version: 4.0.0
   resolution: "path-type@npm:4.0.0"
@@ -6160,6 +6275,20 @@ __metadata:
   languageName: node
   linkType: hard
 
+"sinon@npm:^17.0.1":
+  version: 17.0.1
+  resolution: "sinon@npm:17.0.1"
+  dependencies:
+    "@sinonjs/commons": ^3.0.0
+    "@sinonjs/fake-timers": ^11.2.2
+    "@sinonjs/samsam": ^8.0.0
+    diff: ^5.1.0
+    nise: ^5.1.5
+    supports-color: ^7.2.0
+  checksum: a807c2997d6eabdcaa4409df9fd9816a3e839f96d7e5d76610a33f5e1b60cf37616c6288f0f580262da17ea4ee626c6d1600325bf423e30c5a7f0d9a203e26c0
+  languageName: node
+  linkType: hard
+
 "slash@npm:^3.0.0":
   version: 3.0.0
   resolution: "slash@npm:3.0.0"
@@ -6449,7 +6578,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"supports-color@npm:^7.0.0, supports-color@npm:^7.1.0":
+"supports-color@npm:^7.0.0, supports-color@npm:^7.1.0, supports-color@npm:^7.2.0":
   version: 7.2.0
   resolution: "supports-color@npm:7.2.0"
   dependencies:
@@ -6718,6 +6847,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"type-detect@npm:4.0.8, type-detect@npm:^4.0.8":
+  version: 4.0.8
+  resolution: "type-detect@npm:4.0.8"
+  checksum: 62b5628bff67c0eb0b66afa371bd73e230399a8d2ad30d852716efcc4656a7516904570cd8631a49a3ce57c10225adf5d0cbdcb47f6b0255fe6557c453925a15
+  languageName: node
+  linkType: hard
+
 "type-fest@npm:^0.18.0":
   version: 0.18.1
   resolution: "type-fest@npm:0.18.1"