diff --git a/src/reportToSlack/index.test.ts b/src/reportToSlack/index.test.ts
index 5d296dc..e68cd8a 100644
--- a/src/reportToSlack/index.test.ts
+++ b/src/reportToSlack/index.test.ts
@@ -13,7 +13,7 @@ describe("createSlackReport", () => {
     });
     global.fetch = mockFetch;
 
-    const reportToSlack = createSlackReport(slackUrl);
+    const reportToSlack = createSlackReport(slackUrl, mockFetch);
     await reportToSlack(message, additionalInfo);
 
     expect(mockFetch).toHaveBeenCalledWith(slackUrl, {
@@ -63,7 +63,7 @@ describe("createSlackReport", () => {
     });
     global.fetch = mockFetch;
 
-    const reportToSlack = createSlackReport(slackUrl);
+    const reportToSlack = createSlackReport(slackUrl, mockFetch);
 
     await expect(reportToSlack(message, additionalInfo)).rejects.toThrow(
       "Failed to send report to Slack: 500 Internal Server Error"
diff --git a/src/reportToSlack/index.ts b/src/reportToSlack/index.ts
index 816811e..d9089ff 100644
--- a/src/reportToSlack/index.ts
+++ b/src/reportToSlack/index.ts
@@ -1,6 +1,9 @@
-export const createSlackReport = (slackUrl: string) => {
+export const createSlackReport = (
+  slackUrl: string,
+  fetchPassIn: typeof fetch
+) => {
   return async (message: string, additionalInfo: Record<string, unknown>) => {
-    const res = await fetch(slackUrl, {
+    const res = await fetchPassIn(slackUrl, {
       method: "POST",
       headers: {
         "Content-Type": "application/json",