diff --git a/api/api_test.go b/api/api_test.go
index 490170c..ea2fe2b 100644
--- a/api/api_test.go
+++ b/api/api_test.go
@@ -14,6 +14,7 @@ func mockHTTPHandler(writer http.ResponseWriter, _ *http.Request) {
 }
 
 func TestNewRouterV1WithAuthenticationDisabled(t *testing.T) {
+	config.Config.Server.Token = ""
 	router := mux.NewRouter()
 	v1 := newRouterV1(router)
 
@@ -64,4 +65,5 @@ func TestNewRouterV1WithAuthenticationEnabled(t *testing.T) {
 		router.ServeHTTP(recorder, request)
 		assert.Equal(t, http.StatusUnauthorized, recorder.Code)
 	})
+	config.Config.Server.Token = ""
 }
diff --git a/api/auth/auth_test.go b/api/auth/auth_test.go
index 09290c6..4f1f05b 100644
--- a/api/auth/auth_test.go
+++ b/api/auth/auth_test.go
@@ -21,8 +21,7 @@ type AuthenticationMiddlewareTestSuite struct {
 }
 
 func (suite *AuthenticationMiddlewareTestSuite) SetupTest() {
-	config.Config.Server.Token = testToken
-	InitializeAuthentication()
+	correctAuthenticationToken = []byte(testToken)
 	suite.recorder = httptest.NewRecorder()
 	request, err := http.NewRequest(http.MethodGet, "/api/v1/test", nil)
 	if err != nil {
@@ -35,6 +34,10 @@ func (suite *AuthenticationMiddlewareTestSuite) SetupTest() {
 		}))
 }
 
+func (suite *AuthenticationMiddlewareTestSuite) TearDownTest() {
+	correctAuthenticationToken = []byte(nil)
+}
+
 func (suite *AuthenticationMiddlewareTestSuite) TestReturns401WhenHeaderUnset() {
 	suite.httpAuthenticationMiddleware.ServeHTTP(suite.recorder, suite.request)
 	assert.Equal(suite.T(), http.StatusUnauthorized, suite.recorder.Code)
@@ -69,3 +72,20 @@ func (suite *AuthenticationMiddlewareTestSuite) TestPassesWhenTokenCorrect() {
 func TestHTTPAuthenticationMiddleware(t *testing.T) {
 	suite.Run(t, new(AuthenticationMiddlewareTestSuite))
 }
+
+func TestInitializeAuthentication(t *testing.T) {
+	t.Run("if token unset", func(t *testing.T) {
+		config.Config.Server.Token = ""
+		initialized := InitializeAuthentication()
+		assert.Equal(t, false, initialized)
+		assert.Equal(t, []byte(nil), correctAuthenticationToken, "it should not set correctAuthenticationToken")
+	})
+	t.Run("if token set", func(t *testing.T) {
+		config.Config.Server.Token = testToken
+		initialized := InitializeAuthentication()
+		assert.Equal(t, true, initialized)
+		assert.Equal(t, []byte(testToken), correctAuthenticationToken, "it should set correctAuthenticationToken")
+		config.Config.Server.Token = ""
+		correctAuthenticationToken = []byte(nil)
+	})
+}