diff --git a/src/akonadi/akonadiserializer.cpp b/src/akonadi/akonadiserializer.cpp
--- a/src/akonadi/akonadiserializer.cpp
+++ b/src/akonadi/akonadiserializer.cpp
@@ -99,7 +99,7 @@
     if (naming == FullPath) {
         auto parent = collection.parentCollection();
         while (parent.isValid() && parent != Akonadi::Collection::root()) {
-            name = parent.displayName() + '/' + name;
+            name = parent.displayName() + "»" + name;
             parent = parent.parentCollection();
         }
     }
diff --git a/tests/units/akonadi/akonadiserializertest.cpp b/tests/units/akonadi/akonadiserializertest.cpp
--- a/tests/units/akonadi/akonadiserializertest.cpp
+++ b/tests/units/akonadi/akonadiserializertest.cpp
@@ -345,9 +345,9 @@
         auto dataSource4 = serializer.createDataSourceFromCollection(collection, Akonadi::SerializerInterface::BaseName);
 
         // THEN
-        QCOMPARE(dataSource1->name(), QString(parentName + '/' + name));
+        QCOMPARE(dataSource1->name(), QString(parentName + "»" + name));
         QCOMPARE(dataSource2->name(), name);
-        QCOMPARE(dataSource3->name(), QString(parentName + '/' + name));
+        QCOMPARE(dataSource3->name(), QString(parentName + "»" + name));
         QCOMPARE(dataSource4->name(), name);
     }