diff --git a/Modules/Core/GPUCommon/include/itkGPUReduction.hxx b/Modules/Core/GPUCommon/include/itkGPUReduction.hxx
index a1b885f398e..43823388fde 100644
--- a/Modules/Core/GPUCommon/include/itkGPUReduction.hxx
+++ b/Modules/Core/GPUCommon/include/itkGPUReduction.hxx
@@ -127,8 +127,6 @@ GPUReduction<TElement>::GetReductionKernel(int whichKernel, int blockSize, int i
   defines << "#define T ";
   GetTypenameInString(typeid(TElement), defines);
 
-  std::cout << "Defines: " << defines.str() << std::endl;
-
   const char * GPUSource = GPUReduction::GetOpenCLSource();
 
   // load and build program
diff --git a/Modules/Core/GPUFiniteDifference/include/itkGPUDenseFiniteDifferenceImageFilter.hxx b/Modules/Core/GPUFiniteDifference/include/itkGPUDenseFiniteDifferenceImageFilter.hxx
index fe811a03abd..c177742a1fc 100644
--- a/Modules/Core/GPUFiniteDifference/include/itkGPUDenseFiniteDifferenceImageFilter.hxx
+++ b/Modules/Core/GPUFiniteDifference/include/itkGPUDenseFiniteDifferenceImageFilter.hxx
@@ -59,7 +59,6 @@ GPUDenseFiniteDifferenceImageFilter<TInputImage, TOutputImage, TParentImageFilte
 
   // assumes input and output pixel type is same
   defines << "#define PIXELDIM " << GetPixelDimension(typeid(typename TOutputImage::PixelType)) << "\n";
-  std::cout << "Defines: " << defines.str() << std::endl;
 
   const char * GPUSource = GPUDenseFiniteDifferenceImageFilter::GetOpenCLSource();
 
diff --git a/Modules/Filtering/GPUAnisotropicSmoothing/include/itkGPUGradientNDAnisotropicDiffusionFunction.hxx b/Modules/Filtering/GPUAnisotropicSmoothing/include/itkGPUGradientNDAnisotropicDiffusionFunction.hxx
index ce13549414d..86346248b7c 100644
--- a/Modules/Filtering/GPUAnisotropicSmoothing/include/itkGPUGradientNDAnisotropicDiffusionFunction.hxx
+++ b/Modules/Filtering/GPUAnisotropicSmoothing/include/itkGPUGradientNDAnisotropicDiffusionFunction.hxx
@@ -106,7 +106,6 @@ GPUGradientNDAnisotropicDiffusionFunction<TImage>::GPUGradientNDAnisotropicDiffu
 #else
   defines << "#define ARGTYPE " << pixeltypename << "\n";
 #endif
-  std::cout << "Defines: " << defines.str() << std::endl;
 
   const char * GPUSource = GPUGradientNDAnisotropicDiffusionFunction::GetOpenCLSource();
 
diff --git a/Modules/Filtering/GPUAnisotropicSmoothing/include/itkGPUScalarAnisotropicDiffusionFunction.hxx b/Modules/Filtering/GPUAnisotropicSmoothing/include/itkGPUScalarAnisotropicDiffusionFunction.hxx
index 72c100b478a..743e4f93abe 100644
--- a/Modules/Filtering/GPUAnisotropicSmoothing/include/itkGPUScalarAnisotropicDiffusionFunction.hxx
+++ b/Modules/Filtering/GPUAnisotropicSmoothing/include/itkGPUScalarAnisotropicDiffusionFunction.hxx
@@ -44,8 +44,8 @@ GPUScalarAnisotropicDiffusionFunction<TImage>::GPUScalarAnisotropicDiffusionFunc
   defines << "#define DIM_" << ImageDimension << "\n";
 
   defines << "#define PIXELTYPE ";
+
   GetTypenameInString(typeid(typename TImage::PixelType), defines);
-  std::cout << "Defines: " << defines.str() << std::endl;
 
   const char * GPUSource = GPUScalarAnisotropicDiffusionFunction::GetOpenCLSource();
 
diff --git a/Modules/Filtering/GPUImageFilterBase/include/itkGPUNeighborhoodOperatorImageFilter.hxx b/Modules/Filtering/GPUImageFilterBase/include/itkGPUNeighborhoodOperatorImageFilter.hxx
index 9a9b1e86d4d..604140e553f 100644
--- a/Modules/Filtering/GPUImageFilterBase/include/itkGPUNeighborhoodOperatorImageFilter.hxx
+++ b/Modules/Filtering/GPUImageFilterBase/include/itkGPUNeighborhoodOperatorImageFilter.hxx
@@ -104,8 +104,6 @@ GPUNeighborhoodOperatorImageFilter<TInputImage, TOutputImage, TOperatorValueType
   defines << "#define OPTYPE ";
   GetTypenameInString(typeid(TOperatorValueType), defines);
 
-  std::cout << "Defines: " << defines.str() << std::endl;
-
   const char * GPUSource = GPUNeighborhoodOperatorImageFilter::GetOpenCLSource();
 
   // load and build program
diff --git a/Modules/Filtering/GPUThresholding/include/itkGPUBinaryThresholdImageFilter.hxx b/Modules/Filtering/GPUThresholding/include/itkGPUBinaryThresholdImageFilter.hxx
index f0663897e78..06c47021e80 100644
--- a/Modules/Filtering/GPUThresholding/include/itkGPUBinaryThresholdImageFilter.hxx
+++ b/Modules/Filtering/GPUThresholding/include/itkGPUBinaryThresholdImageFilter.hxx
@@ -92,7 +92,6 @@ GPUBinaryThresholdImageFilter<TInputImage, TOutputImage>::GPUBinaryThresholdImag
     itkExceptionMacro(<< excpMsg.str().c_str());
   }
 
-  std::cout << "Defines: " << defines.str() << std::endl;
   const char * GPUSource = GPUBinaryThresholdImageFilter::GetOpenCLSource();
 
   // load and build program
diff --git a/Modules/Registration/GPUPDEDeformable/include/itkGPUDemonsRegistrationFunction.hxx b/Modules/Registration/GPUPDEDeformable/include/itkGPUDemonsRegistrationFunction.hxx
index 75aae4e671e..3be59a6ac8d 100644
--- a/Modules/Registration/GPUPDEDeformable/include/itkGPUDemonsRegistrationFunction.hxx
+++ b/Modules/Registration/GPUPDEDeformable/include/itkGPUDemonsRegistrationFunction.hxx
@@ -84,7 +84,6 @@ GPUDemonsRegistrationFunction<TFixedImage, TMovingImage, TDisplacementField>::GP
 
   defines << "#define OUTPIXELTYPE ";
   GetTypenameInString(typeid(typename TDisplacementField::PixelType::ValueType), defines);
-  std::cout << "Defines: " << defines.str() << std::endl;
 
   const char * GPUSource = GPUDemonsRegistrationFunction::GetOpenCLSource();
 
diff --git a/Modules/Registration/GPUPDEDeformable/include/itkGPUPDEDeformableRegistrationFilter.hxx b/Modules/Registration/GPUPDEDeformable/include/itkGPUPDEDeformableRegistrationFilter.hxx
index 1aa74bdb70b..deac411338c 100644
--- a/Modules/Registration/GPUPDEDeformable/include/itkGPUPDEDeformableRegistrationFilter.hxx
+++ b/Modules/Registration/GPUPDEDeformable/include/itkGPUPDEDeformableRegistrationFilter.hxx
@@ -62,8 +62,6 @@ GPUPDEDeformableRegistrationFilter<TFixedImage, TMovingImage, TDisplacementField
   defines << "#define OUTPIXELTYPE ";
   GetTypenameInString(typeid(DeformationScalarType), defines);
 
-  std::cout << "Defines: " << defines.str() << std::endl;
-
   using GPUCodeType = const char *;
   GPUCodeType GPUSource = GPUPDEDeformableRegistrationFilter::GetOpenCLSource();