diff --git a/AutomatedTesting/Gem/PythonTests/atom_renderer/CMakeLists.txt b/AutomatedTesting/Gem/PythonTests/atom_renderer/CMakeLists.txt
index 7ffc2072f1..91228bc71c 100644
--- a/AutomatedTesting/Gem/PythonTests/atom_renderer/CMakeLists.txt
+++ b/AutomatedTesting/Gem/PythonTests/atom_renderer/CMakeLists.txt
@@ -20,7 +20,7 @@ if(PAL_TRAIT_BUILD_HOST_TOOLS AND PAL_TRAIT_BUILD_TESTS_SUPPORTED AND AutomatedT
         TEST_SUITE main
         PATH ${CMAKE_CURRENT_LIST_DIR}/test_Atom_MainSuite.py
         TEST_SERIAL
-        TIMEOUT 300
+        TIMEOUT 400
         RUNTIME_DEPENDENCIES
             AssetProcessor
             AutomatedTesting.Assets
@@ -31,7 +31,7 @@ if(PAL_TRAIT_BUILD_HOST_TOOLS AND PAL_TRAIT_BUILD_TESTS_SUPPORTED AND AutomatedT
         TEST_SUITE sandbox
         PATH ${CMAKE_CURRENT_LIST_DIR}/test_Atom_SandboxSuite.py
         TEST_SERIAL
-        TIMEOUT 300
+        TIMEOUT 400
         RUNTIME_DEPENDENCIES
             AssetProcessor
             AutomatedTesting.Assets
diff --git a/AutomatedTesting/Gem/PythonTests/atom_renderer/test_Atom_MainSuite.py b/AutomatedTesting/Gem/PythonTests/atom_renderer/test_Atom_MainSuite.py
index b64a592c1d..3da1c27e67 100644
--- a/AutomatedTesting/Gem/PythonTests/atom_renderer/test_Atom_MainSuite.py
+++ b/AutomatedTesting/Gem/PythonTests/atom_renderer/test_Atom_MainSuite.py
@@ -27,6 +27,7 @@ TEST_DIRECTORY = os.path.join(os.path.dirname(__file__), "atom_hydra_scripts")
 @pytest.mark.parametrize("level", ["auto_test"])
 class TestAtomEditorComponentsMain(object):
 
+    @pytest.mark.xfail(reason="Timing out sporadically, LYN-3956")
     @pytest.mark.test_case_id(
         "C32078130",  # Display Mapper
         "C32078129",  # Light