diff --git a/alerting/provider/custom/custom_test.go b/alerting/provider/custom/custom_test.go
index 92f8c5ba..e1906e44 100644
--- a/alerting/provider/custom/custom_test.go
+++ b/alerting/provider/custom/custom_test.go
@@ -1,6 +1,7 @@
 package custom
 
 import (
+	"github.com/TwinProduction/gatus/core"
 	"io/ioutil"
 	"testing"
 )
@@ -57,3 +58,14 @@ func TestAlertProvider_buildRequestWhenTriggered(t *testing.T) {
 		t.Error("expected body to be", ExpectedBody, "was", string(body))
 	}
 }
+
+func TestAlertProvider_ToCustomAlertProvider(t *testing.T) {
+	provider := AlertProvider{Url: "http://example.com"}
+	customAlertProvider := provider.ToCustomAlertProvider(&core.Service{}, &core.Alert{}, &core.Result{}, true)
+	if customAlertProvider == nil {
+		t.Error("customAlertProvider shouldn't have been nil")
+	}
+	if customAlertProvider != customAlertProvider {
+		t.Error("customAlertProvider should've been equal to customAlertProvider")
+	}
+}
diff --git a/alerting/provider/pagerduty/pagerduty_test.go b/alerting/provider/pagerduty/pagerduty_test.go
index 47765d3f..e4488be7 100644
--- a/alerting/provider/pagerduty/pagerduty_test.go
+++ b/alerting/provider/pagerduty/pagerduty_test.go
@@ -1,6 +1,9 @@
 package pagerduty
 
-import "testing"
+import (
+	"github.com/TwinProduction/gatus/core"
+	"testing"
+)
 
 func TestAlertProvider_IsValid(t *testing.T) {
 	invalidProvider := AlertProvider{IntegrationKey: ""}
@@ -12,3 +15,11 @@ func TestAlertProvider_IsValid(t *testing.T) {
 		t.Error("provider should've been valid")
 	}
 }
+
+func TestAlertProvider_ToCustomAlertProvider(t *testing.T) {
+	provider := AlertProvider{IntegrationKey: "00000000000000000000000000000000"}
+	customAlertProvider := provider.ToCustomAlertProvider(&core.Service{}, &core.Alert{}, &core.Result{}, true)
+	if customAlertProvider == nil {
+		t.Error("customAlertProvider shouldn't have been nil")
+	}
+}
diff --git a/alerting/provider/slack/slack_test.go b/alerting/provider/slack/slack_test.go
index 0a9af3e0..1715376a 100644
--- a/alerting/provider/slack/slack_test.go
+++ b/alerting/provider/slack/slack_test.go
@@ -1,6 +1,9 @@
 package slack
 
-import "testing"
+import (
+	"github.com/TwinProduction/gatus/core"
+	"testing"
+)
 
 func TestAlertProvider_IsValid(t *testing.T) {
 	invalidProvider := AlertProvider{WebhookUrl: ""}
@@ -12,3 +15,11 @@ func TestAlertProvider_IsValid(t *testing.T) {
 		t.Error("provider should've been valid")
 	}
 }
+
+func TestAlertProvider_ToCustomAlertProvider(t *testing.T) {
+	provider := AlertProvider{WebhookUrl: "http://example.com"}
+	customAlertProvider := provider.ToCustomAlertProvider(&core.Service{}, &core.Alert{}, &core.Result{}, true)
+	if customAlertProvider == nil {
+		t.Error("customAlertProvider shouldn't have been nil")
+	}
+}
diff --git a/alerting/provider/twilio/twilio_test.go b/alerting/provider/twilio/twilio_test.go
index c3613b97..0bf9c11c 100644
--- a/alerting/provider/twilio/twilio_test.go
+++ b/alerting/provider/twilio/twilio_test.go
@@ -1,6 +1,9 @@
 package twilio
 
-import "testing"
+import (
+	"github.com/TwinProduction/gatus/core"
+	"testing"
+)
 
 func TestTwilioAlertProvider_IsValid(t *testing.T) {
 	invalidProvider := AlertProvider{}
@@ -17,3 +20,16 @@ func TestTwilioAlertProvider_IsValid(t *testing.T) {
 		t.Error("provider should've been valid")
 	}
 }
+
+func TestAlertProvider_ToCustomAlertProvider(t *testing.T) {
+	provider := AlertProvider{
+		SID:   "1",
+		Token: "1",
+		From:  "1",
+		To:    "1",
+	}
+	customAlertProvider := provider.ToCustomAlertProvider(&core.Service{}, &core.Alert{}, &core.Result{}, true)
+	if customAlertProvider == nil {
+		t.Error("customAlertProvider shouldn't have been nil")
+	}
+}