diff --git a/app/pkg/badge_handler_test.go b/app/pkg/badge_handler_test.go
index c3ddb4e..082677e 100644
--- a/app/pkg/badge_handler_test.go
+++ b/app/pkg/badge_handler_test.go
@@ -39,25 +39,25 @@ func TestGetBadgeErrors(t *testing.T) {
 		{
 			Name:        "422",
 			Query:       `?repo=repo&branch=branch&type=type`,
-			ContentType: "application/json; charset=UTF-8",
+			ContentType: "application/json",
 			Status:      http.StatusUnprocessableEntity,
 		},
 		{
 			Name:        "422",
 			Query:       `?org=org&branch=branch&type=type`,
-			ContentType: "application/json; charset=UTF-8",
+			ContentType: "application/json",
 			Status:      http.StatusUnprocessableEntity,
 		},
 		{
 			Name:        "422",
 			Query:       `?org=org&repo=repo&type=type`,
-			ContentType: "application/json; charset=UTF-8",
+			ContentType: "application/json",
 			Status:      http.StatusUnprocessableEntity,
 		},
 		{
 			Name:        "422",
 			Query:       `?org=org&repo=repo&branch=branch`,
-			ContentType: "application/json; charset=UTF-8",
+			ContentType: "application/json",
 			Status:      http.StatusUnprocessableEntity,
 		},
 	}
diff --git a/app/pkg/chart_handler_test.go b/app/pkg/chart_handler_test.go
index 33b03b4..77cff84 100644
--- a/app/pkg/chart_handler_test.go
+++ b/app/pkg/chart_handler_test.go
@@ -33,24 +33,24 @@ func TestGetChartErrors(t *testing.T) {
 			Name:        "404",
 			Query:       `?org=org&repo=repo&branch=branch&type=type`,
 			Status:      http.StatusNotFound,
-			ContentType: "application/json; charset=UTF-8",
+			ContentType: "application/json",
 		},
 		{
 			Name:        "422",
 			Query:       `?repo=repo&branch=branch&type=type`,
-			ContentType: "application/json; charset=UTF-8",
+			ContentType: "application/json",
 			Status:      http.StatusUnprocessableEntity,
 		},
 		{
 			Name:        "422",
 			Query:       `?org=org&branch=branch&type=type`,
-			ContentType: "application/json; charset=UTF-8",
+			ContentType: "application/json",
 			Status:      http.StatusUnprocessableEntity,
 		},
 		{
 			Name:        "422",
 			Query:       `?org=org&repo=repo&branch=branch`,
-			ContentType: "application/json; charset=UTF-8",
+			ContentType: "application/json",
 			Status:      http.StatusUnprocessableEntity,
 		},
 	}
diff --git a/app/pkg/pr_handler_test.go b/app/pkg/pr_handler_test.go
index bede2a2..a00eaaa 100644
--- a/app/pkg/pr_handler_test.go
+++ b/app/pkg/pr_handler_test.go
@@ -32,25 +32,25 @@ func TestPRErrors(t *testing.T) {
 		{
 			Name:        "409",
 			Query:       `?org=org&repo=repo&branch=branch&base_branch=master&pr_num=2&type=type`,
-			ContentType: "application/json; charset=UTF-8",
+			ContentType: "application/json",
 			Status:      http.StatusConflict,
 		},
 		{
 			Name:        "422",
 			Query:       `?org=org&branch=branch&type=type`,
-			ContentType: "application/json; charset=UTF-8",
+			ContentType: "application/json",
 			Status:      http.StatusUnprocessableEntity,
 		},
 		{
 			Name:        "422",
 			Query:       `?org=org&repo=repo&type=type`,
-			ContentType: "application/json; charset=UTF-8",
+			ContentType: "application/json",
 			Status:      http.StatusUnprocessableEntity,
 		},
 		{
 			Name:        "422",
 			Query:       `?org=org&repo=repo&branch=branch`,
-			ContentType: "application/json; charset=UTF-8",
+			ContentType: "application/json",
 			Status:      http.StatusUnprocessableEntity,
 		},
 	}