diff --git a/webpush.go b/webpush.go
index abbf868..7bd7e7a 100644
--- a/webpush.go
+++ b/webpush.go
@@ -34,21 +34,20 @@ var saltFunc = func() ([]byte, error) {
 	return salt, nil
 }
 
-// httpClient is an interface for sending the notification HTTP request / testing
-type httpClient interface {
+// HTTPClient is an interface for sending the notification HTTP request / testing
+type HTTPClient interface {
 	Do(*http.Request) (*http.Response, error)
 }
 
 // Options are config and extra params needed to send a notification
 type Options struct {
-	httpClient httpClient
-
-	Subscriber      string  // Sub in VAPID JWT token
-	Topic           string  // Set the Topic header to collapse a pending messages (Optional)
-	TTL             int     // Set the TTL on the endpoint POST request
-	Urgency         Urgency // Set the Urgency header to change a message priority (Optional)
-	VAPIDPublicKey  string  // VAPID public key, passed in VAPID Authorization header
-	VAPIDPrivateKey string  // VAPID private key, used to sign VAPID JWT token
+	HTTPClient      HTTPClient // Will replace with *http.Client by default if not included
+	Subscriber      string     // Sub in VAPID JWT token
+	Topic           string     // Set the Topic header to collapse a pending messages (Optional)
+	TTL             int        // Set the TTL on the endpoint POST request
+	Urgency         Urgency    // Set the Urgency header to change a message priority (Optional)
+	VAPIDPublicKey  string     // VAPID public key, passed in VAPID Authorization header
+	VAPIDPrivateKey string     // VAPID private key, used to sign VAPID JWT token
 }
 
 // Keys are the base64 encoded values from PushSubscription.getKey()
@@ -201,11 +200,14 @@ func SendNotification(message []byte, s *Subscription, options *Options) (*http.
 	req.Header.Set("Authorization", vapidAuthHeader)
 
 	// Send the request
-	if options.httpClient == nil {
-		options.httpClient = &http.Client{}
+	var client HTTPClient
+	if options.HTTPClient != nil {
+		client = options.HTTPClient
+	} else {
+		client = &http.Client{}
 	}
 
-	return options.httpClient.Do(req)
+	return client.Do(req)
 }
 
 // decodeSubscriptionKey decodes a base64 subscription key.
diff --git a/webpush_test.go b/webpush_test.go
index 5b9cddf..720177c 100644
--- a/webpush_test.go
+++ b/webpush_test.go
@@ -33,7 +33,7 @@ func getStandardEncodedTestSubscription() *Subscription {
 
 func TestSendNotificationToURLEncodedSubscription(t *testing.T) {
 	resp, err := SendNotification([]byte("Test"), getURLEncodedTestSubscription(), &Options{
-		httpClient:      &testHTTPClient{},
+		HTTPClient:      &testHTTPClient{},
 		Subscriber:      "mailto:<EMAIL@EXAMPLE.COM>",
 		Topic:           "test_topic",
 		TTL:             0,
@@ -56,7 +56,7 @@ func TestSendNotificationToURLEncodedSubscription(t *testing.T) {
 
 func TestSendNotificationToStandardEncodedSubscription(t *testing.T) {
 	resp, err := SendNotification([]byte("Test"), getStandardEncodedTestSubscription(), &Options{
-		httpClient:      &testHTTPClient{},
+		HTTPClient:      &testHTTPClient{},
 		Subscriber:      "mailto:<EMAIL@EXAMPLE.COM>",
 		Topic:           "test_topic",
 		TTL:             0,