diff --git a/Modules/Core/Common/include/itkImageAlgorithm.hxx b/Modules/Core/Common/include/itkImageAlgorithm.hxx
index 94fcb4925a9..9a44b4e9796 100644
--- a/Modules/Core/Common/include/itkImageAlgorithm.hxx
+++ b/Modules/Core/Common/include/itkImageAlgorithm.hxx
@@ -53,8 +53,8 @@ ImageAlgorithm::ReferenceCopy(const InputImageType *                       inIma
     return;
   }
 
-  ImageRegionConstIterator it(inImage, inRegion);
-  ImageRegionIterator      ot(outImage, outRegion);
+  ImageRegionConstIterator<InputImageType> it(inImage, inRegion);
+  ImageRegionIterator<OutputImageType>     ot(outImage, outRegion);
 
   while (!it.IsAtEnd())
   {
diff --git a/Modules/Filtering/RLEImage/test/CMakeLists.txt b/Modules/Filtering/RLEImage/test/CMakeLists.txt
index 4a142680227..d148853ba79 100644
--- a/Modules/Filtering/RLEImage/test/CMakeLists.txt
+++ b/Modules/Filtering/RLEImage/test/CMakeLists.txt
@@ -16,6 +16,10 @@ set(
 
 createtestdriver( RLEImage "${RLEImage-Test_LIBRARIES}" "${RLEImageTests}" )
 
+set(RLEImageGTests itkRLEImageAlgorithmCopyGTest.cxx)
+
+creategoogletestdriver(RLEImage "${RLEImage-Test_LIBRARIES}" "${RLEImageGTests}")
+
 add_executable(
   runFromIDE
   manualTest.cxx
diff --git a/Modules/Filtering/RLEImage/test/itkRLEImageAlgorithmCopyGTest.cxx b/Modules/Filtering/RLEImage/test/itkRLEImageAlgorithmCopyGTest.cxx
new file mode 100644
index 00000000000..3b229fbb240
--- /dev/null
+++ b/Modules/Filtering/RLEImage/test/itkRLEImageAlgorithmCopyGTest.cxx
@@ -0,0 +1,84 @@
+/*=========================================================================
+ *
+ *  Copyright NumFOCUS
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *         https://www.apache.org/licenses/LICENSE-2.0.txt
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *=========================================================================*/
+
+#include "itkImageAlgorithm.h"
+#include "itkRLEImage.h"
+
+#include <gtest/gtest.h>
+
+// Locks in correct iterator deduction in ImageAlgorithm::Copy when the
+// source or destination is a partially-specialized Image-like template.
+namespace
+{
+constexpr unsigned int Dimension = 3;
+using PixelType = short;
+using RLEType = itk::RLEImage<PixelType, Dimension>;
+using ImageType = itk::Image<PixelType, Dimension>;
+
+RLEType::RegionType
+MakeRegion()
+{
+  RLEType::SizeType  size = { { 4, 4, 4 } };
+  RLEType::IndexType start = { { 0, 0, 0 } };
+  return RLEType::RegionType{ start, size };
+}
+} // namespace
+
+TEST(RLEImageAlgorithmCopy, FromRLEToImage)
+{
+  const auto region = MakeRegion();
+
+  auto rle = RLEType::New();
+  rle->SetRegions(region);
+  rle->Allocate();
+  rle->FillBuffer(7);
+
+  auto dst = ImageType::New();
+  dst->SetRegions(region);
+  dst->Allocate();
+  dst->FillBuffer(0);
+
+  itk::ImageAlgorithm::Copy<RLEType, ImageType>(rle.GetPointer(), dst.GetPointer(), region, region);
+
+  for (itk::ImageRegionConstIterator<ImageType> it(dst, region); !it.IsAtEnd(); ++it)
+  {
+    ASSERT_EQ(it.Get(), 7) << "Mismatch at " << it.GetIndex();
+  }
+}
+
+TEST(RLEImageAlgorithmCopy, FromImageToRLE)
+{
+  const auto region = MakeRegion();
+
+  auto src = ImageType::New();
+  src->SetRegions(region);
+  src->Allocate();
+  src->FillBuffer(11);
+
+  auto rleDst = RLEType::New();
+  rleDst->SetRegions(region);
+  rleDst->Allocate();
+  rleDst->FillBuffer(0);
+
+  itk::ImageAlgorithm::Copy<ImageType, RLEType>(src.GetPointer(), rleDst.GetPointer(), region, region);
+
+  for (itk::ImageRegionConstIterator<RLEType> it(rleDst, region); !it.IsAtEnd(); ++it)
+  {
+    ASSERT_EQ(it.Get(), 11) << "Mismatch at " << it.GetIndex();
+  }
+}
diff --git a/Modules/IO/VTK/test/itkVTIImageIOReadWriteTest.cxx b/Modules/IO/VTK/test/itkVTIImageIOReadWriteTest.cxx
index 7bb22e43d7e..dd9fb617c58 100644
--- a/Modules/IO/VTK/test/itkVTIImageIOReadWriteTest.cxx
+++ b/Modules/IO/VTK/test/itkVTIImageIOReadWriteTest.cxx
@@ -89,7 +89,7 @@ itkVTIImageIOReadWriteTest(int argc, char * argv[])
   reader->SetFileName(inputImage);
   ITK_TRY_EXPECT_NO_EXCEPTION(reader->UpdateOutputInformation());
 
-  auto imageIO = reader->GetImageIO();
+  auto imageIO = reader->GetModifiableImageIO();
   imageIO->SetFileName(inputImage);
 
   ITK_TRY_EXPECT_NO_EXCEPTION(imageIO->ReadImageInformation());