diff --git a/tests/units/testlib/gentodotest.cpp b/tests/units/testlib/gentodotest.cpp
--- a/tests/units/testlib/gentodotest.cpp
+++ b/tests/units/testlib/gentodotest.cpp
@@ -24,6 +24,7 @@
 #include "testlib/gentodo.h"
 
 #include <KCalCore/Todo>
+#include <kcalcore_version.h>
 
 #include <testlib/qtest_zanshin.h>
 
@@ -141,6 +142,10 @@
         item = GenTodo(item).done(false);
 
         // THEN
+        // KCalCore 5.2.40 fixes this bug
+#if KCALCORE_VERSION < 0x050228
+        QEXPECT_FAIL("", "Bug introduced in KCalCore, fixed in upcoming 16.04", Continue);
+#endif
         QVERIFY(!item.payload<KCalCore::Todo::Ptr>()->isCompleted());
     }