diff --git a/Common/Transforms/Testing/Tcl/MatrixToTransform.tcl b/Common/Transforms/Testing/Tcl/MatrixToTransform.tcl
index 0bf3044c23c4961337d8db24d69a88d2f09c6da2..7fa75efb734c20fb33c0df2991ea5cf1e8b30382 100644
--- a/Common/Transforms/Testing/Tcl/MatrixToTransform.tcl
+++ b/Common/Transforms/Testing/Tcl/MatrixToTransform.tcl
@@ -249,6 +249,8 @@ ren42 SetViewport 0.75 0.0 1.0 0.5
 ren42 ResetCamera -0.5 0.5 -0.5 0.5 -1 1
 ren42 AddActor a42
 renWin AddRenderer ren42
+
+renWin SetMultiSamples 0
 renWin Render
 
 
diff --git a/Filters/Core/Testing/Tcl/fieldToUGrid.tcl b/Filters/Core/Testing/Tcl/fieldToUGrid.tcl
index a46f6ca8f15194aa0786a570f5972cffeada927a..44255776ea90e4fbaeb62b82098bf36feb8e02b8 100644
--- a/Filters/Core/Testing/Tcl/fieldToUGrid.tcl
+++ b/Filters/Core/Testing/Tcl/fieldToUGrid.tcl
@@ -106,6 +106,7 @@ ren1 ResetCamera
 ren1 ResetCameraClippingRange
 ren1 SetBackground 1 1 1
 renWin SetSize 375 200
+renWin SetMultiSamples 0
 
 iren Initialize
 iren AddObserver UserEvent {wm deiconify .vtkInteract}
diff --git a/Filters/General/Testing/Tcl/cursor2D.tcl b/Filters/General/Testing/Tcl/cursor2D.tcl
index 2e64b275928b897bddf4331937f6a1d6a1f22585..2e57395509f1ea71f5e8c3be1f446b47e8550f92 100644
--- a/Filters/General/Testing/Tcl/cursor2D.tcl
+++ b/Filters/General/Testing/Tcl/cursor2D.tcl
@@ -68,6 +68,7 @@ ren1 AddActor cursor4Actor
 
 ren1 SetBackground 0 0 0
 renWin SetSize 120 120
+renWin SetMultiSamples 0
 renWin Render
 
 iren AddObserver UserEvent {wm deiconify .vtkInteract}
diff --git a/IO/Geometry/Testing/Tcl/TestChacoReader.tcl b/IO/Geometry/Testing/Tcl/TestChacoReader.tcl
index f592da90a0eaf6bc9455c336105d8698e3da2762..f1d1821700cdd0380b13fd1b697c3347610593ec 100644
--- a/IO/Geometry/Testing/Tcl/TestChacoReader.tcl
+++ b/IO/Geometry/Testing/Tcl/TestChacoReader.tcl
@@ -36,6 +36,7 @@ ren1 AddActor actor0
 ren1 SetBackground 0 0 0
 
 renWin SetSize 300 300
+renWin SetMultiSamples 0
 iren Initialize
 renWin Render