diff --git a/tests/unit/utils/net/form-data.spec.ts b/tests/unit/utils/net/form-data.spec.ts
new file mode 100644
index 0000000..a4d97db
--- /dev/null
+++ b/tests/unit/utils/net/form-data.spec.ts
@@ -0,0 +1,120 @@
+import mockFs from "mock-fs";
+import { FileInfo } from "@/utils/io/file-info";
+import { FILE_PATH, FormData, isFormData, toFormData } from "@/utils/net/form-data";
+import { isBlob } from "@/utils/net/blob";
+
+beforeEach(() => {
+    mockFs({
+        "file.json": "{}",
+    });
+});
+
+afterEach(() => {
+    mockFs.restore();
+});
+
+describe("FormData", () => {
+    describe("constructor", () => {
+        test("creates a new FormData instance", () => {
+            const formData = new FormData();
+
+            expect(formData).toBeDefined();
+            expect(isFormData(formData)).toBe(true);
+        });
+    });
+});
+
+describe("FILE_PATH", () => {
+    test("is defined", () => {
+        expect(typeof FILE_PATH).toBe("symbol");
+    });
+});
+
+describe("isFormData", () => {
+    test("returns true when data is an instance of FormData", () => {
+        const formData = new FormData();
+
+        expect(isFormData(formData)).toBe(true);
+    });
+
+    test("returns false when data is not an instance of FormData", () => {
+        const notFormData = { foo: "bar" };
+
+        expect(isFormData(notFormData)).toBe(false);
+    });
+
+    test("returns false when data is null", () => {
+        expect(isFormData(null)).toBe(false);
+    });
+
+    test("returns false when data is undefined", () => {
+        expect(isFormData(undefined)).toBe(false);
+    });
+});
+
+describe("toFormData", () => {
+    test("returns undefined when input cannot be converted to a FormData instance", () => {
+        const formData = toFormData("Why are we here? Just to suffer?");
+
+        expect(formData).toBeUndefined();
+    });
+
+    test("returns the input when it is already a FormData instance", () => {
+        const obj = new FormData();
+
+        const formData = toFormData(obj);
+
+        expect(formData).toBe(obj);
+    });
+
+    test("converts an object to a FormData instance", () => {
+        const obj = { key1: "value1", key2: "value2" };
+
+        const formData = toFormData(obj);
+
+        expect(isFormData(formData)).toBe(true);
+        expect(formData.get("key1")).toBe("value1");
+        expect(formData.get("key2")).toBe("value2");
+    });
+
+    test("converts an array of key/value pairs to a FormData instance", () => {
+        const obj = [["key1", "value1"], ["key2", "value2"]];
+
+        const formData = toFormData(obj);
+
+        expect(isFormData(formData)).toBe(true);
+        expect(formData.get("key1")).toBe("value1");
+        expect(formData.get("key2")).toBe("value2");
+    });
+
+    test("converts an array to a FormData entry and includes it in the FormData", () => {
+        const obj = { key1: ["value1", "value2"] };
+
+        const formData = toFormData(obj);
+
+        expect(isFormData(formData)).toBe(true);
+        expect(formData.getAll("key1")).toEqual(["value1", "value2"]);
+    });
+
+    test("ignores undefined and null values", () => {
+        const obj = { key1: undefined, key2: null, key3: "value3" };
+
+        const formData = toFormData(obj);
+
+        expect(isFormData(formData)).toBe(true);
+        expect(formData.has("key1")).toBe(false);
+        expect(formData.has("key2")).toBe(false);
+        expect(formData.get("key3")).toBe("value3");
+    });
+
+    test("converts a FileInfo instance to a Blob and includes it in the FormData", () => {
+        const obj = { file: FileInfo.of("file.json") };
+
+        const formData = toFormData(obj);
+        const file = formData.get("file");
+
+        expect(isFormData(formData)).toBe(true);
+        expect(isBlob(file)).toBe(true);
+        expect(file).toHaveProperty("name", "file.json");
+    });
+});