diff --git a/autotests/integration/shell_client_test.cpp b/autotests/integration/shell_client_test.cpp
--- a/autotests/integration/shell_client_test.cpp
+++ b/autotests/integration/shell_client_test.cpp
@@ -366,7 +366,6 @@
     QEXPECT_FAIL("wlShell - deco", "BUG 366764", Continue);
     QEXPECT_FAIL("xdgShellV5 - deco", "BUG 366764", Continue);
     QCOMPARE(c->geometry(), QRect(QPoint(0, 0), sizeChangeRequestedSpy.first().first().toSize()));
-    QEXPECT_FAIL("", "Fullscreen windows don't change layer", Continue);
     QCOMPARE(c->layer(), ActiveLayer);
 
     // swap back to normal
diff --git a/shell_client.cpp b/shell_client.cpp
--- a/shell_client.cpp
+++ b/shell_client.cpp
@@ -917,11 +917,12 @@
 void ShellClient::clientFullScreenChanged(bool fullScreen)
 {
     StackingUpdatesBlocker blocker(workspace());
-    workspace()->updateClientLayer(this);   // active fullscreens get different layer
 
     const bool emitSignal = m_fullScreen != fullScreen;
     m_fullScreen = fullScreen;
 
+    workspace()->updateClientLayer(this);   // active fullscreens get different layer
+
     if (fullScreen) {
         m_geomFsRestore = geometry();
         requestGeometry(workspace()->clientArea(FullScreenArea, this));