diff --git a/.gitlab/ci/ctest_exclusions.cmake b/.gitlab/ci/ctest_exclusions.cmake
index 4a570340596dc5a25be8ed542b4ab02ff0fe09e9..7efa80a0c28c406f53b5b8e0e34826abd8938e4f 100644
--- a/.gitlab/ci/ctest_exclusions.cmake
+++ b/.gitlab/ci/ctest_exclusions.cmake
@@ -2,11 +2,7 @@ set(test_exclusions
   # Flaky when run with threads enabled. See #19471.
   "^VTK::FiltersCellGridCxx-TestCellGridEvaluator$"
   # https://gitlab.kitware.com/vtk/vtk/-/issues/19427
-  "^VTK::RenderingOpenGL2Cxx-TestGlyph3DMapperPickability$"
-  # https://gitlab.kitware.com/vtk/vtk/-/issues/19544
-  "^vtkRenderingParallel-TestClientServerRendering$"
-  # https://gitlab.kitware.com/vtk/vtk/-/issues/19542
-  "^vtkParallelCore-TestSocketCommunicator$")
+  "^VTK::RenderingOpenGL2Cxx-TestGlyph3DMapperPickability$")
 
 if (NOT "$ENV{CMAKE_CONFIGURATION}" MATCHES "windows")
   list(APPEND test_exclusions
diff --git a/Parallel/Core/Testing/Cxx/CMakeLists.txt b/Parallel/Core/Testing/Cxx/CMakeLists.txt
index 13feab9e4c3715afb0f50b28681dde48d6d444ef..1eceefb0c63f3292f5ce5469ae5daacf37f83371 100644
--- a/Parallel/Core/Testing/Cxx/CMakeLists.txt
+++ b/Parallel/Core/Testing/Cxx/CMakeLists.txt
@@ -11,7 +11,7 @@ if (Python3_EXECUTABLE)
     vtkParallelCore-TestSocketCommunicator TestSocketCommunicator.cxx)
 
   add_test(NAME vtkParallelCore-TestSocketCommunicator
-           COMMAND ${PYTHON_EXECUTABLE}
+           COMMAND ${Python3_EXECUTABLE}
                    ${VTK_SOURCE_DIR}/CMake/vtkTestDriver.py
                    # indicate that the processes are not run sequentially,
                    --process
diff --git a/Rendering/Parallel/Testing/Cxx/CMakeLists.txt b/Rendering/Parallel/Testing/Cxx/CMakeLists.txt
index 59e21c39db013515bfbbbbc9707ed080e73bbf7b..b2e45a84436878e01e7ddf80380c6d937d0348dc 100644
--- a/Rendering/Parallel/Testing/Cxx/CMakeLists.txt
+++ b/Rendering/Parallel/Testing/Cxx/CMakeLists.txt
@@ -23,7 +23,7 @@ if (Python3_EXECUTABLE)
 
   ExternalData_add_test(${_vtk_build_TEST_DATA_TARGET}
     NAME vtkRenderingParallel-TestClientServerRendering
-    COMMAND ${PYTHON_EXECUTABLE}
+    COMMAND ${Python3_EXECUTABLE}
       ${VTK_SOURCE_DIR}/CMake/vtkTestDriver.py
       --process
         $<TARGET_FILE:vtkRenderingParallel-TestClientServerRendering>