diff --git a/fetch/api/basic/scheme-blob.sub.any.js b/fetch/api/basic/scheme-blob.sub.any.js
index eaf01ebdf29629..cfa99506af6f0d 100644
--- a/fetch/api/basic/scheme-blob.sub.any.js
+++ b/fetch/api/basic/scheme-blob.sub.any.js
@@ -42,7 +42,47 @@ invalidRequestMethods.forEach(function(method) {
   checkKoUrl(URL.createObjectURL(blob2), method, "Fetching [" + method + "] URL.createObjectURL(blob) is KO");
 });
 
+var empty_blob = new Blob([]);
+checkFetchResponse(URL.createObjectURL(empty_blob), "", "", 0,
+                  "Fetching URL.createObjectURL(empty_blob) is OK");
+
+var empty_type_blob = new Blob([], {type: ""});
+checkFetchResponse(URL.createObjectURL(empty_type_blob), "", "", 0,
+                  "Fetching URL.createObjectURL(empty_type_blob) is OK");
+
+var empty_data_blob = new Blob([], {type: "text/plain"});
+checkFetchResponse(URL.createObjectURL(empty_data_blob), "", "text/plain", 0,
+                  "Fetching URL.createObjectURL(empty_data_blob) is OK");
+
 checkKoUrl("blob:not-backed-by-a-blob/", "GET",
            "Fetching [GET] blob:not-backed-by-a-blob/ is KO");
 
+promise_test(function(test) {
+  var blob = new Blob(["content type with invalid character"], {"type": "text/plain"});
+  let slice = blob.slice(8, 25, "\0");
+  return fetch(URL.createObjectURL(slice)).then(function (resp) {
+    assert_equals(resp.status, 200, "HTTP status is 200");
+    assert_equals(resp.type, "basic", "response type is basic");
+    assert_equals(resp.headers.get("Content-Type"), "");
+    assert_equals(resp.headers.get("Content-Length"), "17");
+    return resp.text();
+  }).then(function(bodyAsText) {
+    assert_equals(bodyAsText, "type with invalid");
+  });
+}, "Set content type to the empty string for slice with invalid content type");
+
+promise_test(function(test) {
+  var blob = new Blob(["content type that is empty"], {"type": "text/plain"});
+  let slice = blob.slice(8, 20);
+  return fetch(URL.createObjectURL(slice)).then(function (resp) {
+    assert_equals(resp.status, 200, "HTTP status is 200");
+    assert_equals(resp.type, "basic", "response type is basic");
+    assert_equals(resp.headers.get("Content-Type"), "");
+    assert_equals(resp.headers.get("Content-Length"), "12");
+    return resp.text();
+  }).then(function(bodyAsText) {
+    assert_equals(bodyAsText, "type that is");
+  });
+}, "Set content type to the empty string for slice with no content type ");
+
 done();