diff --git a/Projects/AthGeneration/CMakeLists.txt b/Projects/AthGeneration/CMakeLists.txt
index 8a4a04ddf1ee4614d8456c24d11a73a239cc8701..eb980084becae1473c4ca1e7d7dcd8974098ff55 100644
--- a/Projects/AthGeneration/CMakeLists.txt
+++ b/Projects/AthGeneration/CMakeLists.txt
@@ -1,4 +1,4 @@
-# Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
+# Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
 
 # Set up the project.
 cmake_minimum_required( VERSION 3.6 )
@@ -12,7 +12,7 @@ set( ATLAS_FLAKE8 flake8_atlas --select ATL,F,E101,E7,E9,W6
                                --ignore ATL238,ATL9,E701,E702,E704,E741
                                --enable-extensions ATL902
    CACHE STRING "Default flake8 command" )
-set( ATLAS_PYTHON_CHECKER ${ATLAS_FLAKE8} --filterFiles AthenaConfiguration
+set( ATLAS_PYTHON_CHECKER ${ATLAS_FLAKE8}
    CACHE STRING "Python checker command to run during Python module compilation" )
 
 # Find the ATLAS CMake code:
diff --git a/Projects/AthSimulation/CMakeLists.txt b/Projects/AthSimulation/CMakeLists.txt
index d44b378aeeb53bb2b5a05a6eddd0c3c21fead0cd..ba1d4504be2feba298039cb00951333f50b620ec 100644
--- a/Projects/AthSimulation/CMakeLists.txt
+++ b/Projects/AthSimulation/CMakeLists.txt
@@ -1,4 +1,4 @@
-# Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
+# Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
 
 # Set up the project.
 cmake_minimum_required( VERSION 3.6 )
@@ -12,7 +12,7 @@ set( ATLAS_FLAKE8 flake8_atlas --select ATL,F,E101,E7,E9,W6
                                --ignore ATL238,ATL9,E701,E702,E704,E741
                                --enable-extensions ATL902
    CACHE STRING "Default flake8 command" )
-set( ATLAS_PYTHON_CHECKER ${ATLAS_FLAKE8} --filterFiles AthenaConfiguration
+set( ATLAS_PYTHON_CHECKER ${ATLAS_FLAKE8}
    CACHE STRING "Python checker command to run during Python module compilation" )
 
 # Find the ATLAS CMake code:
diff --git a/Projects/Athena/CMakeLists.txt b/Projects/Athena/CMakeLists.txt
index 807280b7e7cb85821cc381eaa080bb03e85a1c8a..1eead5133a334870a2cb1d5566f6f700630a3144 100644
--- a/Projects/Athena/CMakeLists.txt
+++ b/Projects/Athena/CMakeLists.txt
@@ -1,4 +1,4 @@
-# Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
+# Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
 
 # Set up the project.
 cmake_minimum_required( VERSION 3.10 )
@@ -52,7 +52,7 @@ set( ATLAS_FLAKE8 flake8_atlas --select ATL,F,E101,E7,E9,W6
                                --ignore ATL238,ATL9,E701,E702,E704,E741
                                --enable-extensions ATL902
    CACHE STRING "Default flake8 command" )
-set( ATLAS_PYTHON_CHECKER ${ATLAS_FLAKE8} --filterFiles AthenaConfiguration
+set( ATLAS_PYTHON_CHECKER ${ATLAS_FLAKE8}
    CACHE STRING "Python checker command to run during Python module compilation" )
 
 # Find the ATLAS CMake code: