diff --git a/builtins/web/blob.cpp b/builtins/web/blob.cpp
index 35475d0..dc30145 100644
--- a/builtins/web/blob.cpp
+++ b/builtins/web/blob.cpp
@@ -54,7 +54,7 @@ JSString* normalize_type(JSContext *cx, HandleValue value) {
     return JS::ToString(cx, value);
   }
 
-  if (value.isUndefined()) {
+  if (value.isUndefined() || !value.isString()) {
     return JS_GetEmptyString(cx);
   }
 
@@ -394,7 +394,8 @@ bool Blob::init_options(JSContext *cx, HandleObject self, HandleValue initv) {
   }
 
   if (!has_type && !has_endings) {
-    return false;
+    // Use defaults
+    return true;
   }
 
   if (has_type) {
@@ -424,7 +425,8 @@ bool Blob::init_options(JSContext *cx, HandleObject self, HandleValue initv) {
     }
 
     if (!is_transparent && !is_native) {
-      return false;
+    // Use defaults
+      return true;
     }
 
     auto endings = is_native ? Blob::Endings::Native : Blob::Endings::Transparent;
diff --git a/tests/wpt-harness/expectations/FileAPI/blob/Blob-constructor.any.js.json b/tests/wpt-harness/expectations/FileAPI/blob/Blob-constructor.any.js.json
index 436677a..a91f3e0 100644
--- a/tests/wpt-harness/expectations/FileAPI/blob/Blob-constructor.any.js.json
+++ b/tests/wpt-harness/expectations/FileAPI/blob/Blob-constructor.any.js.json
@@ -102,28 +102,28 @@
     "status": "PASS"
   },
   "Passing object \"[object Object]\" (index 2) for options should use the defaults.": {
-    "status": "FAIL"
+    "status": "PASS"
   },
   "Passing object \"[object Object]\" (index 2) for options should use the defaults (with newlines).": {
-    "status": "FAIL"
+    "status": "PASS"
   },
   "Passing object \"[object Object]\" (index 3) for options should use the defaults.": {
-    "status": "FAIL"
+    "status": "PASS"
   },
   "Passing object \"[object Object]\" (index 3) for options should use the defaults (with newlines).": {
-    "status": "FAIL"
+    "status": "PASS"
   },
   "Passing object \"/regex/\" (index 4) for options should use the defaults.": {
-    "status": "FAIL"
+    "status": "PASS"
   },
   "Passing object \"/regex/\" (index 4) for options should use the defaults (with newlines).": {
-    "status": "FAIL"
+    "status": "PASS"
   },
   "Passing function \"function() {}\" (index 5) for options should use the defaults.": {
-    "status": "FAIL"
+    "status": "PASS"
   },
   "Passing function \"function() {}\" (index 5) for options should use the defaults (with newlines).": {
-    "status": "FAIL"
+    "status": "PASS"
   },
   "Passing 123 for options should throw": {
     "status": "PASS"
diff --git a/tests/wpt-harness/wpt.cmake b/tests/wpt-harness/wpt.cmake
index 23e9368..b536159 100644
--- a/tests/wpt-harness/wpt.cmake
+++ b/tests/wpt-harness/wpt.cmake
@@ -12,13 +12,13 @@ endif()
 if(DEFINED ENV{WPT_ROOT})
     set(WPT_ROOT $ENV{WPT_ROOT})
 else()
-	CPMAddPackage(
-	  NAME wpt-suite
-	  GITHUB_REPOSITORY web-platform-tests/wpt
-	  GIT_TAG 04d2e6c42ddce90925d73a076f6cfdd5786e8e54
-	  DOWNLOAD_ONLY TRUE
-	)
-	set(WPT_ROOT ${CPM_PACKAGE_wpt-suite_SOURCE_DIR})
+    CPMAddPackage(
+      NAME wpt-suite
+      GITHUB_REPOSITORY web-platform-tests/wpt
+      GIT_TAG 04d2e6c42ddce90925d73a076f6cfdd5786e8e54
+      DOWNLOAD_ONLY TRUE
+    )
+    set(WPT_ROOT ${CPM_PACKAGE_wpt-suite_SOURCE_DIR})
 endif()
 
 add_builtin(wpt_support