diff --git a/tests/unit/games/minecraft/mojang-api-client.spec.ts b/tests/unit/games/minecraft/mojang-api-client.spec.ts
new file mode 100644
index 0000000..53f1560
--- /dev/null
+++ b/tests/unit/games/minecraft/mojang-api-client.spec.ts
@@ -0,0 +1,82 @@
+import { createFakeFetch } from "../../../utils/fetch-utils";
+import { MOJANG_API_URL, MojangApiClient } from "@/games/minecraft/mojang-api-client";
+
+const MOJANG_FETCH = createFakeFetch({
+    baseUrl: MOJANG_API_URL,
+
+    GET: {
+        "^\\/game\\/version_manifest_v2\\.json$": () => [__dirname, "../../../content/mojang/version_manifest_v2.json"],
+    },
+});
+
+describe("MojangApiClient", () => {
+    describe("getMinecraftVersion", () => {
+        test("returns a version with the specified id", async () => {
+            const api = new MojangApiClient({ fetch: MOJANG_FETCH });
+
+            expect(await api.getMinecraftVersion("1.17")).toHaveProperty("id", "1.17");
+            expect(await api.getMinecraftVersion("1.16.5")).toHaveProperty("id", "1.16.5");
+            expect(await api.getMinecraftVersion("inf-20100618")).toHaveProperty("id", "inf-20100618");
+            expect(await api.getMinecraftVersion("13w26a")).toHaveProperty("id", "13w26a");
+            expect(await api.getMinecraftVersion("1.RV-Pre1")).toHaveProperty("id", "1.RV-Pre1");
+            expect(await api.getMinecraftVersion("1.14.2 Pre-Release 4")).toHaveProperty("id", "1.14.2 Pre-Release 4");
+            expect(await api.getMinecraftVersion("22w13oneblockatatime")).toHaveProperty("id", "22w13oneblockatatime");
+            expect(await api.getMinecraftVersion("23w46a")).toHaveProperty("id", "23w46a");
+            expect(await api.getMinecraftVersion("1.20.4")).toHaveProperty("id", "1.20.4");
+        });
+
+        test("returns undefined if a version with the specified id doesn't exist", async () => {
+            const api = new MojangApiClient({ fetch: MOJANG_FETCH });
+
+            expect(await api.getMinecraftVersion("1.17.-1")).toBeUndefined();
+            expect(await api.getMinecraftVersion("1.16.6")).toBeUndefined();
+            expect(await api.getMinecraftVersion("inf-20100619")).toBeUndefined();
+            expect(await api.getMinecraftVersion("13w26d")).toBeUndefined();
+            expect(await api.getMinecraftVersion("1.RV-Pre2")).toBeUndefined();
+            expect(await api.getMinecraftVersion("1.14.2 Pre-Release 24")).toBeUndefined();
+            expect(await api.getMinecraftVersion("22w13twoblocksatatime")).toBeUndefined();
+            expect(await api.getMinecraftVersion("03w46a")).toBeUndefined();
+            expect(await api.getMinecraftVersion("Not a Minecraft version")).toBeUndefined();
+        });
+    });
+
+    describe("getMinecraftVersions", () => {
+        test("returns versions that satisfy the specified range", async () => {
+            // ESLint doesn't allow us to use `expect` in `forEach`
+            // because of the `no-loop-func` rule.
+            // So, we need to copy it in a constant for ESLint to shut up.
+            const $ = expect;
+
+            const api = new MojangApiClient({ fetch: MOJANG_FETCH });
+
+            const ranges = [
+                ["1.17", 1, ["1.17"], ["1.16.5"]],
+                [["1.17"], 1, ["1.17"], ["1.16.5"]],
+                [">1.17 <=1.18", 27, ["1.17.1-pre1", "1.17.1", "21w44a", "1.18"], ["1.17", "1.18.1"]],
+                [">1.17 <=1.18 || 1.17", 28, ["1.17", "1.17.1-pre1", "1.17.1", "21w44a", "1.18"], ["1.16.5", "1.18.1"]],
+                [[">1.17 <=1.18", "1.17"], 28, ["1.17", "1.17.1-pre1", "1.17.1", "21w44a", "1.18"], ["1.16.5", "1.18.1"]],
+                [["(1.17,1.18] || 1.17"], 28, ["1.17", "1.17.1-pre1", "1.17.1", "21w44a", "1.18"], ["1.16.5", "1.18.1"]],
+                [["(1.17,1.18]", "1.17"], 28, ["1.17", "1.17.1-pre1", "1.17.1", "21w44a", "1.18"], ["1.16.5", "1.18.1"]],
+                ["23w13a_or_b || 20w14infinite || 1.RV-Pre1 || 2.0", 3, ["23w13a_or_b", "20w14infinite", "1.RV-Pre1"], ["2.0"]],
+                [["23w13a_or_b", "20w14infinite", "1.RV-Pre1", "2.0"], 3, ["23w13a_or_b", "20w14infinite", "1.RV-Pre1"], ["2.0"]],
+            ] as const;
+
+            for (const [range, length, includedVersions, excludedVersions] of ranges) {
+                const versions = (await api.getMinecraftVersions(range)).map(x => x.id);
+
+                $(versions).toHaveLength(length);
+                includedVersions.forEach((x: string) => $(versions).toContain(x));
+                excludedVersions.forEach((x: string) => $(versions).not.toContain(x));
+            }
+        });
+
+        test("returns an empty array if no version satisfy the specified range", async () => {
+            const api = new MojangApiClient({ fetch: MOJANG_FETCH });
+
+            expect(await api.getMinecraftVersions(">=2.0 <3.0 || 99.0")).toHaveLength(0);
+            expect(await api.getMinecraftVersions(["[2.0,3.0)", "99.0"])).toHaveLength(0);
+            expect(await api.getMinecraftVersions("99.0")).toHaveLength(0);
+            expect(await api.getMinecraftVersions("Not a Minecraft version")).toHaveLength(0);
+        });
+    });
+});