diff --git a/CMakeLists.txt b/CMakeLists.txt
index 57cdee72e2..1846cbe97c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -290,12 +290,6 @@ find_package(XCB 1.10 REQUIRED COMPONENTS
 )
 set_package_properties(XCB PROPERTIES TYPE REQUIRED)
 
-# and the optional XCB dependencies
-if (XCB_ICCCM_VERSION VERSION_LESS "0.4")
-    set(XCB_ICCCM_FOUND FALSE)
-endif()
-add_feature_info("XCB-ICCCM" XCB_ICCCM_FOUND "Required for building test applications for KWin")
-
 find_package(X11_XCB)
 set_package_properties(X11_XCB PROPERTIES
     PURPOSE "Required for building X11 windowed backend of kwin_wayland"
diff --git a/autotests/CMakeLists.txt b/autotests/CMakeLists.txt
index 772ab4e20f..940efc7fc4 100644
--- a/autotests/CMakeLists.txt
+++ b/autotests/CMakeLists.txt
@@ -87,23 +87,21 @@ target_link_libraries(testXcbWrapper
 add_test(NAME kwin-testXcbWrapper COMMAND testXcbWrapper)
 ecm_mark_as_test(testXcbWrapper)
 
-if (XCB_ICCCM_FOUND)
-    add_executable(testXcbSizeHints test_xcb_size_hints.cpp xcb_scaling_mock.cpp)
-    set_target_properties(testXcbSizeHints PROPERTIES COMPILE_DEFINITIONS "NO_NONE_WINDOW")
-    target_link_libraries(testXcbSizeHints
-        Qt::GuiPrivate
-        Qt::Test
-        Qt::Widgets
-
-        KF6::ConfigCore
-        KF6::WindowSystem
-
-        XCB::ICCCM
-        XCB::XCB
-    )
-    add_test(NAME kwin-testXcbSizeHints COMMAND testXcbSizeHints)
-    ecm_mark_as_test(testXcbSizeHints)
-endif()
+add_executable(testXcbSizeHints test_xcb_size_hints.cpp xcb_scaling_mock.cpp)
+set_target_properties(testXcbSizeHints PROPERTIES COMPILE_DEFINITIONS "NO_NONE_WINDOW")
+target_link_libraries(testXcbSizeHints
+    Qt::GuiPrivate
+    Qt::Test
+    Qt::Widgets
+
+    KF6::ConfigCore
+    KF6::WindowSystem
+
+    XCB::ICCCM
+    XCB::XCB
+)
+add_test(NAME kwin-testXcbSizeHints COMMAND testXcbSizeHints)
+ecm_mark_as_test(testXcbSizeHints)
 
 ########################################################
 # Test XcbWindow
diff --git a/autotests/integration/CMakeLists.txt b/autotests/integration/CMakeLists.txt
index 2ba2904d2c..5798b38007 100644
--- a/autotests/integration/CMakeLists.txt
+++ b/autotests/integration/CMakeLists.txt
@@ -103,34 +103,32 @@ integrationTest(NAME testScreenEdges SRCS screenedges_test.cpp)
 integrationTest(NAME testOutputChanges SRCS outputchanges_test.cpp)
 integrationTest(NAME testTiles SRCS tiles_test.cpp)
 integrationTest(NAME testFractionalScaling SRCS fractional_scaling_test.cpp)
-if (TARGET K::KPipeWire)
-    integrationTest(NAME testScreencasting SRCS screencasting_test.cpp LIBS K::KPipeWire)
-endif()
+integrationTest(NAME testMoveResize SRCS move_resize_window_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testStruts SRCS struts_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testShade SRCS shade_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testDontCrashAuroraeDestroyDeco SRCS dont_crash_aurorae_destroy_deco.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testPlasmaWindow SRCS plasmawindow_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testScreenEdgeClientShow SRCS screenedge_client_show_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testX11DesktopWindow SRCS desktop_window_x11_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testXwaylandInput SRCS xwayland_input_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testWindowRules SRCS window_rules_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testX11Window SRCS x11_window_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testQuickTiling SRCS quick_tiling_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testGlobalShortcuts SRCS globalshortcuts_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testStackingOrder SRCS stacking_order_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testDbusInterface SRCS dbus_interface_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testXwaylandServerCrash SRCS xwaylandserver_crash_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testXwaylandServerRestart SRCS xwaylandserver_restart_test.cpp LIBS XCB::ICCCM)
 
 qt_add_dbus_interfaces(DBUS_SRCS ${CMAKE_BINARY_DIR}/src/org.kde.kwin.VirtualKeyboard.xml)
 integrationTest(NAME testVirtualKeyboardDBus SRCS test_virtualkeyboard_dbus.cpp ${DBUS_SRCS})
 
-if (XCB_ICCCM_FOUND)
-    integrationTest(NAME testMoveResize SRCS move_resize_window_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testStruts SRCS struts_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testShade SRCS shade_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testDontCrashAuroraeDestroyDeco SRCS dont_crash_aurorae_destroy_deco.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testPlasmaWindow SRCS plasmawindow_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testScreenEdgeClientShow SRCS screenedge_client_show_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testX11DesktopWindow SRCS desktop_window_x11_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testXwaylandInput SRCS xwayland_input_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testWindowRules SRCS window_rules_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testX11Window SRCS x11_window_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testQuickTiling SRCS quick_tiling_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testGlobalShortcuts SRCS globalshortcuts_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testStackingOrder SRCS stacking_order_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testDbusInterface SRCS dbus_interface_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testXwaylandServerCrash SRCS xwaylandserver_crash_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testXwaylandServerRestart SRCS xwaylandserver_restart_test.cpp LIBS XCB::ICCCM)
+if (TARGET K::KPipeWire)
+    integrationTest(NAME testScreencasting SRCS screencasting_test.cpp LIBS K::KPipeWire)
+endif()
 
-    if (KWIN_BUILD_ACTIVITIES)
-        integrationTest(NAME testActivities SRCS activities_test.cpp LIBS XCB::ICCCM)
-    endif()
+if (KWIN_BUILD_ACTIVITIES)
+    integrationTest(NAME testActivities SRCS activities_test.cpp LIBS XCB::ICCCM)
 endif()
 
 add_subdirectory(scripting)
diff --git a/autotests/integration/effects/CMakeLists.txt b/autotests/integration/effects/CMakeLists.txt
index 33557d59fc..b9560ea102 100644
--- a/autotests/integration/effects/CMakeLists.txt
+++ b/autotests/integration/effects/CMakeLists.txt
@@ -1,8 +1,6 @@
-if (XCB_ICCCM_FOUND)
-    integrationTest(NAME testTranslucency SRCS translucency_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testSlidingPopups SRCS slidingpopups_test.cpp LIBS XCB::ICCCM)
-    integrationTest(NAME testShadeWobblyWindows SRCS wobbly_shade_test.cpp LIBS XCB::ICCCM)
-endif()
+integrationTest(NAME testTranslucency SRCS translucency_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testSlidingPopups SRCS slidingpopups_test.cpp LIBS XCB::ICCCM)
+integrationTest(NAME testShadeWobblyWindows SRCS wobbly_shade_test.cpp LIBS XCB::ICCCM)
 integrationTest(NAME testScriptedEffects SRCS scripted_effects_test.cpp)
 integrationTest(WAYLAND_ONLY NAME testToplevelOpenCloseAnimation SRCS toplevel_open_close_animation_test.cpp)
 integrationTest(WAYLAND_ONLY NAME testPopupOpenCloseAnimation SRCS popup_open_close_animation_test.cpp)
diff --git a/src/config-kwin.h.cmake b/src/config-kwin.h.cmake
index 83e06a639f..54b6d34193 100644
--- a/src/config-kwin.h.cmake
+++ b/src/config-kwin.h.cmake
@@ -23,13 +23,6 @@
 #define BREEZE_KDECORATION_PLUGIN_ID "${BREEZE_KDECORATION_PLUGIN_ID}"
 #endif
 
-#cmakedefine01 XCB_ICCCM_FOUND
-#if !XCB_ICCCM_FOUND
-#define XCB_ICCCM_WM_STATE_WITHDRAWN 0
-#define XCB_ICCCM_WM_STATE_NORMAL 1
-#define XCB_ICCCM_WM_STATE_ICONIC 3
-#endif
-
 #cmakedefine01 PipeWire_FOUND
 
 #cmakedefine01 HAVE_XWAYLAND_LISTENFD
diff --git a/src/events.cpp b/src/events.cpp
index c71ad3a950..3b94c75503 100644
--- a/src/events.cpp
+++ b/src/events.cpp
@@ -47,9 +47,7 @@
 
 #include <xcb/damage.h>
 #include <xcb/sync.h>
-#if XCB_ICCCM_FOUND
 #include <xcb/xcb_icccm.h>
-#endif
 
 #include "composite.h"
 #include "x11eventfilter.h"
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index dc6a0ba8fe..832012551f 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,8 +1,6 @@
-if (XCB_ICCCM_FOUND)
-    set(normalhintsbasesizetest_SRCS normalhintsbasesizetest.cpp)
-    add_executable(normalhintsbasesizetest ${normalhintsbasesizetest_SRCS})
-    target_link_libraries(normalhintsbasesizetest XCB::XCB XCB::ICCCM KF6::WindowSystem)
-endif()
+set(normalhintsbasesizetest_SRCS normalhintsbasesizetest.cpp)
+add_executable(normalhintsbasesizetest ${normalhintsbasesizetest_SRCS})
+target_link_libraries(normalhintsbasesizetest XCB::XCB XCB::ICCCM KF6::WindowSystem)
 
 # next target
 set(screenedgeshowtest_SRCS screenedgeshowtest.cpp)