diff --git a/.gitlab/.gitignore b/.gitlab/.gitignore
index a4a3ddde23..91e677b937 100644
--- a/.gitlab/.gitignore
+++ b/.gitlab/.gitignore
@@ -1,5 +1,5 @@
 # Ignore files known to be downloaded by CI jobs.
-/5.15.1-0-202009071110*
+/6.9.3-0-202509261208*
 /6.9.3-0-202509261207*
 /appimagetool
 /bcc*
diff --git a/.gitlab/ci/configure_windows_vs2019_x64_ninja.cmake b/.gitlab/ci/configure_windows_vs2019_x64_ninja.cmake
deleted file mode 100644
index c078f9049e..0000000000
--- a/.gitlab/ci/configure_windows_vs2019_x64_ninja.cmake
+++ /dev/null
@@ -1 +0,0 @@
-include("${CMAKE_CURRENT_LIST_DIR}/configure_windows_vs_common_ninja.cmake")
diff --git a/.gitlab/ci/download_qt.cmake b/.gitlab/ci/download_qt.cmake
index 418a1899df..759365e170 100644
--- a/.gitlab/ci/download_qt.cmake
+++ b/.gitlab/ci/download_qt.cmake
@@ -1,14 +1,5 @@
 cmake_minimum_required(VERSION 3.29)
 
-# Input variables.
-set(qt_version_major "5")
-set(qt_version_minor "15")
-set(qt_version_patch "1")
-
-# Combined version variables.
-set(qt_version "${qt_version_major}.${qt_version_minor}.${qt_version_patch}")
-set(qt_version_nodot "${qt_version_major}${qt_version_minor}${qt_version_patch}")
-
 set(qt_tar_workdir ".gitlab")
 
 # Files needed to download.
@@ -31,37 +22,13 @@ if ("$ENV{CMAKE_CONFIGURATION}" MATCHES "windows.*package")
     message(FATAL_ERROR "Unknown arch to use for Qt")
   endif()
 elseif ("$ENV{CMAKE_CONFIGURATION}" MATCHES "windows")
-  # Determine the ABI to fetch for Qt.
-  if ("$ENV{CMAKE_CONFIGURATION}" MATCHES "vs2015")
-    set(qt_platform "windows_x86")
-    set(msvc_year "2015")
-    set(qt_abi "win64_msvc${msvc_year}_64")
-  elseif ("$ENV{CMAKE_CONFIGURATION}" MATCHES "vs2017" OR
-          "$ENV{CMAKE_CONFIGURATION}" MATCHES "vs2019" OR
-          "$ENV{CMAKE_CONFIGURATION}" MATCHES "vs2022" OR
-          "$ENV{CMAKE_CONFIGURATION}" MATCHES "vs2026")
-    set(qt_platform "windows_x86")
-    set(msvc_year "2019")
-    set(qt_abi "win64_msvc${msvc_year}_64")
-  else ()
-    message(FATAL_ERROR "Unknown ABI to use for Qt")
-  endif ()
-
-  set(qt_build_stamp "202009071110")
-
-  set(qt_file_name_prefix "${qt_version}-0-${qt_build_stamp}")
-
-  foreach (qt_component IN ITEMS qtbase qtwinextras)
-    list(APPEND qt_files
-      "${qt_file_name_prefix}${qt_component}-Windows-Windows_10-MSVC${msvc_year}-Windows-Windows_10-X86_64.7z")
-  endforeach ()
-
-  set(qt_subdir "${qt_version}/msvc${msvc_year}_64")
-
   # This URL is only visible inside of Kitware's network.
   # Please use your own Qt Account to obtain these files.
   set(qt_url_root "https://paraview.org/files/dependencies/internal/qt")
-  set(qt_url_path "${qt_platform}/desktop/qt5_${qt_version_nodot}/qt.qt5.${qt_version_nodot}.${qt_abi}")
+  set(qt_url_path "windows_x86/desktop/qt6_693/qt6_693/qt.qt6.693.win64_msvc2022_64")
+  list(APPEND qt_files "6.9.3-0-202509261208qtbase-Windows-Windows_11_23H2-MSVC2022-Windows-Windows_11_23H2-X86_64.7z")
+  set(qt_subdir "qt-extract")
+  set(qt_tar_workdir ".gitlab/${qt_subdir}")
 elseif ("$ENV{CMAKE_CONFIGURATION}" MATCHES "macos")
   if ("$ENV{CMAKE_CONFIGURATION}" MATCHES "macos10.10_package")
     set(qt_url_root "https://cmake.org/files/dependencies/qt")
@@ -134,29 +101,6 @@ foreach (qt_file IN LISTS qt_files)
   file(REMOVE "${qt_file}")
 endforeach ()
 
-# The Windows tarballs have some unfortunate permissions in them that prevent
-# deletion when `git clean -ffdx` tries to clean up the directory.
-if (qt_platform STREQUAL "windows_x86")
-  # Fix permissions.
-  file(TO_NATIVE_PATH ".gitlab/${qt_subdir}/*.*" native_qt_dir)
-  execute_process(
-    # Remove any read-only flags that aren't affected by `icacls`.
-    COMMAND
-      attrib
-      -r # Remove readonly flag
-      "${native_qt_dir}"
-      /d # Treat as a directory
-      /s # Recursive
-      /l # Don't dereference symlinks
-    RESULT_VARIABLE res
-    ERROR_VARIABLE err
-    ERROR_STRIP_TRAILING_WHITESPACE)
-  if (res)
-    message(FATAL_ERROR
-      "Failed to fix remove read-only flags in ${qt_file}: ${err}")
-  endif ()
-endif ()
-
 # Move to a predictable prefix.
 file(RENAME
   ".gitlab/${qt_subdir}"
diff --git a/.gitlab/ci/download_qt_hashes.cmake b/.gitlab/ci/download_qt_hashes.cmake
index 6275954155..ea3220a3c2 100644
--- a/.gitlab/ci/download_qt_hashes.cmake
+++ b/.gitlab/ci/download_qt_hashes.cmake
@@ -2,17 +2,11 @@
 #
 #   sha256sum $files | awk '{ print "set(\"" $2 "_hash\" " $1 ")" }' >> $thisfile
 
-set("5.15.1-0-202009071110qtbase-Windows-Windows_10-MSVC2019-Windows-Windows_10-X86_64.7z_hash" a5635124a135f383d9fb92bf628b018cff9f781addfd388926a367cda5b7cd38)
-set("5.15.1-0-202009071110qtwinextras-Windows-Windows_10-MSVC2019-Windows-Windows_10-X86_64.7z_hash" 908947855b5d7a854886746365ac29e9296b5d64d4e18089641a6988167807d3)
-
-set("5.15.1-0-202009071110qtbase-Windows-Windows_10-MSVC2015-Windows-Windows_10-X86_64.7z_hash" 5d0d2e71e3b00cf88ac4c616b4b314a7e73871f325512821f53c464cdfee961f)
-set("5.15.1-0-202009071110qtwinextras-Windows-Windows_10-MSVC2015-Windows-Windows_10-X86_64.7z_hash" 803e0234169464babb5305dedc21382e90c3266c6f9414ff0cff04be578681e1)
-
-set("5.15.1-0-202009071110qtbase-MacOS-MacOS_10_13-Clang-MacOS-MacOS_10_13-X86_64.7z_hash" df2813ce7c6cb4287abd7956cd1cb9d08312e4ac1208b6cb57af4df11b8ebba1)
-
 set("qt-5.9.9-macosx10.10-x86_64-arm64.tar.xz_hash" d4449771afa0bc6a809c14f1e6d939e7732494cf059503ae451e2bfe8fc60cc1)
 set("6.9.3-0-202509261207qtbase-MacOS-MacOS_15-Clang-MacOS-MacOS_15-X86_64-ARM64.7z_hash" 805144e619b7c7b0e9c985d929e1f290241d88b884218db3ad7d56bd579d6b4a)
 
+set("6.9.3-0-202509261208qtbase-Windows-Windows_11_23H2-MSVC2022-Windows-Windows_11_23H2-X86_64.7z_hash" 94f8a097d3078661943446c9ecfee3fb4375d9b992a91a1a2d1856379c749d8d)
+
 set("qt-6.10.1-win-arm64-msvc_v145-1.zip_hash" 59e150883f31c0e31a2890f06b6e434ad44505dba876fda4a7c0994c9b0bdfe1)
 set("qt-6.10.1-win-i386-msvc_v145-1.zip_hash" 09100628aecb7cdde07040d7437c09830ed8c17720960b10339b114cb4bbf18b)
 set("qt-6.10.1-win-x86_64-msvc_v145-1.zip_hash" 931f2354c715b30bc0ac35028f9d778aa552aa8a66580fc73c6a32384c5fa042)
diff --git a/Tests/CMakeGUI/CMakeLists.txt b/Tests/CMakeGUI/CMakeLists.txt
index d4c9bf89b7..6e2bcf5b45 100644
--- a/Tests/CMakeGUI/CMakeLists.txt
+++ b/Tests/CMakeGUI/CMakeLists.txt
@@ -2,7 +2,12 @@ include(CMakeParseArguments)
 
 get_property(CMake_QT_MAJOR_VERSION TARGET cmake-gui PROPERTY CMake_QT_MAJOR_VERSION)
 
-find_package(Qt${CMake_QT_MAJOR_VERSION}Test REQUIRED)
+find_package(Qt${CMake_QT_MAJOR_VERSION} REQUIRED COMPONENTS
+  Core
+  Gui
+  Test
+  Widgets
+)
 
 if(MSVC)
   # QTBUG-118993: Qt uses deprecated stdext::checked_array_iterator