diff --git a/fastly/alerts_test.go b/fastly/alerts_test.go
index 148230483..eb5752097 100644
--- a/fastly/alerts_test.go
+++ b/fastly/alerts_test.go
@@ -164,6 +164,75 @@ func TestClient_FastlyAlerts(t *testing.T) {
 	}
 }
 
+func TestClient_FastlyPercentAlerts(t *testing.T) {
+	t.Parallel()
+
+	testDimensions := map[string][]string{}
+	testEvaluationStrategy := map[string]any{
+		"period":       "2m",
+		"threshold":    0.1, // Increase of 10 percent
+		"type":         "percent_increase",
+		"ignore_below": float64(5),
+	}
+	cadi := &CreateAlertDefinitionInput{
+		Description:        ToPointer("test description"),
+		Dimensions:         testDimensions,
+		EvaluationStrategy: testEvaluationStrategy,
+		IntegrationIDs:     []string{},
+		Metric:             ToPointer("status_5xx"),
+		Name:               ToPointer("test name"),
+		ServiceID:          ToPointer(testServiceID),
+		Source:             ToPointer("stats"),
+	}
+
+	// Create
+	var ad *AlertDefinition
+	var err error
+	record(t, "alerts/create_alert_definition_stats_percent", func(c *Client) {
+		ad, err = c.CreateAlertDefinition(cadi)
+
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	// Ensure deleted
+	defer func() {
+		record(t, "alerts/cleanup_alert_definition_stats_percent", func(c *Client) {
+			err = c.DeleteAlertDefinition(&DeleteAlertDefinitionInput{
+				ID: &ad.ID,
+			})
+		})
+	}()
+
+	if ad.Description != "test description" {
+		t.Errorf("bad description: %v", ad.Description)
+	}
+
+	if ad.Metric != "status_5xx" {
+		t.Errorf("bad metric: %v", ad.Metric)
+	}
+
+	if ad.Name != "test name" {
+		t.Errorf("bad name: %v", ad.Name)
+	}
+
+	if ad.ServiceID != testServiceID {
+		t.Errorf("bad service_id: %v", ad.ServiceID)
+	}
+
+	if ad.Source != "stats" {
+		t.Errorf("bad source: %v", ad.Source)
+	}
+
+	if diff := cmp.Diff(testDimensions, ad.Dimensions); diff != "" {
+		t.Errorf("bad dimensions: diff -want +got\n%v", diff)
+	}
+
+	if diff := cmp.Diff(testEvaluationStrategy, ad.EvaluationStrategy); diff != "" {
+		t.Errorf("bad evaluation_strategy: diff -want +got\n%v", diff)
+	}
+}
+
 func TestClient_GetAlertDefinition_validation(t *testing.T) {
 	var err error
 	_, err = testClient.GetAlertDefinition(&GetAlertDefinitionInput{
diff --git a/fastly/fixtures/alerts/cleanup_alert_definition_stats_percent.yaml b/fastly/fixtures/alerts/cleanup_alert_definition_stats_percent.yaml
new file mode 100644
index 000000000..151af5c02
--- /dev/null
+++ b/fastly/fixtures/alerts/cleanup_alert_definition_stats_percent.yaml
@@ -0,0 +1,43 @@
+---
+version: 1
+interactions:
+- request:
+    body: ""
+    form: {}
+    headers:
+      User-Agent:
+      - FastlyGo/9.2.2 (+github.com/fastly/go-fastly; go1.22.1)
+    url: https://api.fastly.com/alerts/definitions/6v7dRqITNUwcbMoIg3UHiT
+    method: DELETE
+  response:
+    body: ""
+    headers:
+      Accept-Ranges:
+      - bytes
+      Cache-Control:
+      - no-store
+      Date:
+      - Tue, 16 Apr 2024 13:11:28 GMT
+      Pragma:
+      - no-cache
+      Server:
+      - control-gateway
+      Status:
+      - 204 No Content
+      Strict-Transport-Security:
+      - max-age=31536000
+      Vary:
+      - Accept-Encoding
+      Via:
+      - 1.1 varnish
+      X-Cache:
+      - MISS
+      X-Cache-Hits:
+      - "0"
+      X-Served-By:
+      - cache-yul1970048-YUL
+      X-Timer:
+      - S1713273088.055584,VS0,VE167
+    status: 204 No Content
+    code: 204
+    duration: ""
diff --git a/fastly/fixtures/alerts/create_alert_definition_stats_percent.yaml b/fastly/fixtures/alerts/create_alert_definition_stats_percent.yaml
new file mode 100644
index 000000000..7641308b8
--- /dev/null
+++ b/fastly/fixtures/alerts/create_alert_definition_stats_percent.yaml
@@ -0,0 +1,53 @@
+---
+version: 1
+interactions:
+- request:
+    body: '{"description":"test description","dimensions":{},"evaluation_strategy":{"ignore_below":5,"period":"2m","threshold":0.1,"type":"percent_increase"},"integration_ids":[],"metric":"status_5xx","name":"test
+      name","service_id":"7i6HN3TK9wS159v2gPAZ8A","source":"stats"}'
+    form: {}
+    headers:
+      Accept:
+      - application/json
+      Content-Type:
+      - application/json
+      User-Agent:
+      - FastlyGo/9.2.2 (+github.com/fastly/go-fastly; go1.22.1)
+    url: https://api.fastly.com/alerts/definitions
+    method: POST
+  response:
+    body: '{"id":"6v7dRqITNUwcbMoIg3UHiT","object":"definition","service_id":"7i6HN3TK9wS159v2gPAZ8A","name":"test
+      name","description":"test description","dimensions":{},"metric":"status_5xx","source":"stats","evaluation_strategy":{"ignore_below":5,"period":"2m","threshold":0.1,"type":"percent_increase"},"integration_ids":[],"updated_at":"2024-04-16T13:11:27Z","created_at":"2024-04-16T13:11:27Z"}'
+    headers:
+      Accept-Ranges:
+      - bytes
+      Cache-Control:
+      - no-store
+      Content-Length:
+      - "388"
+      Content-Type:
+      - application/json
+      Date:
+      - Tue, 16 Apr 2024 13:11:28 GMT
+      Pragma:
+      - no-cache
+      Server:
+      - control-gateway
+      Status:
+      - 201 Created
+      Strict-Transport-Security:
+      - max-age=31536000
+      Vary:
+      - Accept-Encoding
+      Via:
+      - 1.1 varnish
+      X-Cache:
+      - MISS
+      X-Cache-Hits:
+      - "0"
+      X-Served-By:
+      - cache-yul1970048-YUL
+      X-Timer:
+      - S1713273088.516499,VS0,VE519
+    status: 201 Created
+    code: 201
+    duration: ""