diff --git a/src/synapse/authProvider.test.js b/src/synapse/authProvider.test.js
new file mode 100644
index 0000000..1fecbc3
--- /dev/null
+++ b/src/synapse/authProvider.test.js
@@ -0,0 +1,137 @@
+import { waitFor } from "@testing-library/react";
+
+import authProvider from "./authProvider";
+
+describe("authProvider", () => {
+  beforeEach(() => {
+    fetch.resetMocks();
+    localStorage.clear();
+  });
+
+  describe("login", () => {
+    it("should successfully login with username and password", async () => {
+      fetch.once(
+        JSON.stringify({
+          home_server: "example.com",
+          user_id: "@user:example.com",
+          access_token: "foobar",
+          device_id: "some_device",
+        })
+      );
+
+      const ret = await authProvider.login({
+        base_url: "http://example.com",
+        username: "@user:example.com",
+        password: "secret",
+      });
+
+      expect(ret).toBe(undefined);
+      expect(fetch).toBeCalledWith(
+        "http://example.com/_matrix/client/r0/login",
+        {
+          body: '{"device_id":null,"initial_device_display_name":"Synapse Admin","type":"m.login.password","user":"@user:example.com","password":"secret"}',
+          headers: new Headers({
+            Accept: ["application/json"],
+            "Content-Type": ["application/json"],
+          }),
+          method: "POST",
+        }
+      );
+      expect(localStorage.getItem("base_url")).toEqual("http://example.com");
+      expect(localStorage.getItem("user_id")).toEqual("@user:example.com");
+      expect(localStorage.getItem("access_token")).toEqual("foobar");
+      expect(localStorage.getItem("device_id")).toEqual("some_device");
+    });
+  });
+
+  it("should successfully login with token", async () => {
+    fetch.once(
+      JSON.stringify({
+        home_server: "example.com",
+        user_id: "@user:example.com",
+        access_token: "foobar",
+        device_id: "some_device",
+      })
+    );
+
+    const ret = await authProvider.login({
+      base_url: "https://example.com/",
+      loginToken: "login_token",
+    });
+
+    expect(ret).toBe(undefined);
+    expect(fetch).toBeCalledWith(
+      "https://example.com/_matrix/client/r0/login",
+      {
+        body: '{"device_id":null,"initial_device_display_name":"Synapse Admin","type":"m.login.token","token":"login_token"}',
+        headers: new Headers({
+          Accept: ["application/json"],
+          "Content-Type": ["application/json"],
+        }),
+        method: "POST",
+      }
+    );
+    expect(localStorage.getItem("base_url")).toEqual("https://example.com");
+    expect(localStorage.getItem("user_id")).toEqual("@user:example.com");
+    expect(localStorage.getItem("access_token")).toEqual("foobar");
+    expect(localStorage.getItem("device_id")).toEqual("some_device");
+  });
+
+  describe("logout", () => {
+    it("should remove the access_token from localStorage", async () => {
+      localStorage.setItem("base_url", "example.com");
+      localStorage.setItem("access_token", "foo");
+      fetch.mockResponse(JSON.stringify({}));
+
+      await authProvider.logout();
+
+      expect(fetch).toBeCalledWith("example.com/_matrix/client/r0/logout", {
+        headers: new Headers({
+          Accept: ["application/json"],
+          Authorization: ["Bearer foo"],
+        }),
+        method: "POST",
+        user: { authenticated: true, token: "Bearer foo" },
+      });
+      waitFor(() => expect(localStorage.getItem("access_token")).toBeNull());
+    });
+  });
+
+  describe("checkError", () => {
+    it("should resolve if error.status is not 401 or 403", async () => {
+      await expect(
+        authProvider.checkError({ status: 200 })
+      ).resolves.toBeUndefined();
+    });
+
+    it("should reject if error.status is 401", async () => {
+      await expect(
+        authProvider.checkError({ status: 401 })
+      ).rejects.toBeUndefined();
+    });
+
+    it("should reject if error.status is 403", async () => {
+      await expect(
+        authProvider.checkError({ status: 403 })
+      ).rejects.toBeUndefined();
+    });
+  });
+
+  describe("checkAuth", () => {
+    it("should reject when not logged in", async () => {
+      await expect(authProvider.checkAuth({})).rejects.toBeUndefined();
+    });
+
+    it("should resolve when logged in", async () => {
+      localStorage.setItem("access_token", "foobar");
+
+      await expect(authProvider.checkAuth({})).resolves.toBeUndefined();
+    });
+  });
+
+  describe("getPermissions", () => {
+    it("should do nothing", async () => {
+      await expect(authProvider.getPermissions()).resolves.toBeUndefined();
+    });
+  });
+});