diff --git a/tests/output.test.ts b/tests/output.test.ts
new file mode 100644
index 00000000..249e37f0
--- /dev/null
+++ b/tests/output.test.ts
@@ -0,0 +1,102 @@
+import { Outputs } from "../src/output";
+import * as mockedExecUtils from "../src/utils/exec";
+
+jest.mock("@actions/core", () => ({
+    info: jest.fn(),
+    debug: jest.fn(),
+}));
+describe("Outputs tests", () => {
+    afterEach(() => {
+        jest.clearAllMocks();
+    });
+
+    test("Rustc version", async () => {
+        for (const stdout of [
+            "rustc 1.75.0-nightly (aa1a71e9e 2023-10-26)",
+            "rustc 1.75.0 (aa1a71e9e 2023-10-26)",
+        ]) {
+            jest.spyOn(mockedExecUtils, "execStdout").mockReturnValue(
+                Promise.resolve(stdout),
+            );
+            const output = await Outputs.rustc();
+            expect(output.value).toBe(stdout.split(" ")[1]);
+        }
+    });
+
+    test("Rustc hash", async () => {
+        for (const stdout of [
+            "rustc 1.75.0-nightly (aa1a71e9e 2023-10-26)",
+            "rustc 1.75.0 (aa1a71e9e 2023-10-26)",
+        ]) {
+            jest.spyOn(mockedExecUtils, "execStdout").mockReturnValue(
+                Promise.resolve(stdout),
+            );
+            const output = await Outputs.rustcHash();
+            expect(output.value).toBe(
+                stdout.split(" ")[2].split(" ")[0].substring(1),
+            );
+        }
+    });
+
+    test("Cargo version", async () => {
+        for (const stdout of [
+            "cargo 1.75.0-nightly (df3509237 2023-10-24)",
+            "cargo 1.75.0 (df3509237 2023-10-24)",
+        ]) {
+            jest.spyOn(mockedExecUtils, "execStdout").mockReturnValue(
+                Promise.resolve(stdout),
+            );
+            const output = await Outputs.cargo();
+            expect(output.value).toBe(stdout.split(" ")[1]);
+        }
+    });
+
+    test("Rustup version", async () => {
+        for (const stdout of [
+            "rustup 1.26.0 (5af9b9484 2023-04-05)\n" +
+                "info: This is the version for the rustup toolchain manager, not the rustc compiler.\n" +
+                "info: The currently active `rustc` version is `rustc 1.75.0-nightly (aa1a71e9e 2023-10-26)`",
+        ]) {
+            jest.spyOn(mockedExecUtils, "execStdout").mockReturnValue(
+                Promise.resolve(stdout),
+            );
+            const output = await Outputs.rustUp();
+            expect(output.value).toBe(stdout.split(" ")[1]);
+        }
+    });
+
+    test("All", async () => {
+        jest.spyOn(Outputs, "rustc").mockReturnValue(
+            Promise.resolve({
+                name: "rustc",
+                value: "rustc",
+            }),
+        );
+        jest.spyOn(Outputs, "rustcHash").mockReturnValue(
+            Promise.resolve({
+                name: "rustc_hash",
+                value: "rustcHash",
+            }),
+        );
+        jest.spyOn(Outputs, "cargo").mockReturnValue(
+            Promise.resolve({
+                name: "cargo",
+                value: "cargo",
+            }),
+        );
+        jest.spyOn(Outputs, "rustUp").mockReturnValue(
+            Promise.resolve({
+                name: "rustup",
+                value: "rustup",
+            }),
+        );
+
+        expect(
+            (await new Outputs().outputs())
+                .map((output) => {
+                    return output.value;
+                })
+                .toString(),
+        ).toBe(["rustc", "rustcHash", "cargo", "rustup"].toString());
+    });
+});