diff --git a/Tests/Resources/testappcast.xml b/Tests/Resources/testappcast.xml
index ff8e6b41..25feb687 100644
--- a/Tests/Resources/testappcast.xml
+++ b/Tests/Resources/testappcast.xml
@@ -6,7 +6,8 @@
         <title>Version 2.0</title>
         <description>desc</description>
         <pubDate>Sat, 26 Jul 2014 15:20:11 +0000</pubDate>
-        <enclosure url="http://localhost:1337/Sparkle_Test_App.zip" sparkle:version="2.0" length="1346234" />
+        <enclosure url="http://localhost:1337/Sparkle_Test_App.zip" sparkle:version="2.0" />
+        <sparkle:tags> <sparkle:criticalUpdate /> </sparkle:tags>
     </item>
     <!-- The best chosen release -->
     <item>
diff --git a/Tests/SUAppcastTest.swift b/Tests/SUAppcastTest.swift
index ec840a1e..20f25b2c 100644
--- a/Tests/SUAppcastTest.swift
+++ b/Tests/SUAppcastTest.swift
@@ -24,19 +24,23 @@ class SUAppcastTest: XCTestCase {
             XCTAssertEqual("Version 2.0", items[0].title);
             XCTAssertEqual("desc", items[0].itemDescription);
             XCTAssertEqual("Sat, 26 Jul 2014 15:20:11 +0000", items[0].dateString)
+            XCTAssertTrue(items[0].isCriticalUpdate);
             
             // This is the best release matching our system version
             XCTAssertEqual("Version 3.0", items[1].title);
             XCTAssertNil(items[1].itemDescription);
             XCTAssertNil(items[1].dateString)
+            XCTAssertFalse(items[1].isCriticalUpdate);
             
             XCTAssertEqual("Version 4.0", items[2].title);
             XCTAssertNil(items[2].itemDescription);
             XCTAssertEqual("Sat, 26 Jul 2014 15:20:13 +0000", items[2].dateString)
+            XCTAssertFalse(items[2].isCriticalUpdate);
             
             XCTAssertEqual("Version 5.0", items[3].title);
             XCTAssertNil(items[3].itemDescription);
             XCTAssertNil(items[3].dateString)
+            XCTAssertFalse(items[3].isCriticalUpdate);
             
             // Test best appcast item & a delta update item
             var deltaItem: SUAppcastItem? = nil