diff --git a/src/axiosInterceptor.test.ts b/src/axiosInterceptor.test.ts
index eaf6ce97..e75b6c3b 100644
--- a/src/axiosInterceptor.test.ts
+++ b/src/axiosInterceptor.test.ts
@@ -74,7 +74,7 @@ describe("axios interceptor", () => {
     // Assert
     const request = moxios.requests.first();
     expect(request.headers["Content-Type"]).toEqual(
-      "application/json;charset=utf-8"
+      "application/json"
     );
   });
 
@@ -96,7 +96,7 @@ describe("axios interceptor", () => {
     // Assert
     const request = moxios.requests.first();
     expect(request.headers["Content-Type"]).toEqual(
-      "application/json;charset=utf-8"
+      "application/json"
     );
   });
 });
diff --git a/src/interceptor.test.ts b/src/interceptor.test.ts
index aae477a1..b1ce5fe7 100644
--- a/src/interceptor.test.ts
+++ b/src/interceptor.test.ts
@@ -165,7 +165,7 @@ describe("interceptor", () => {
         region: "local",
         host: "example.com",
         body: '{"foo":"bar"}',
-        headers: { "Content-Type": "application/json;charset=utf-8" },
+        headers: { "Content-Type": "application/json" },
       },
       undefined
     );