diff --git a/src/test/bin/CMakeLists.txt b/src/test/bin/CMakeLists.txt
index 93020d1851..37e40b3cfb 100644
--- a/src/test/bin/CMakeLists.txt
+++ b/src/test/bin/CMakeLists.txt
@@ -38,8 +38,10 @@ if(BUILD_TESTING)
   )
 
   foreach(image ${images})
+    if (NOT EXISTS ${CMAKE_CURRENT_BINARY_DIR}/${image})
       message(STATUS "Downloading ${images_url}/${image}")
       file(DOWNLOAD ${images_url}/${image} ${CMAKE_CURRENT_BINARY_DIR}/${image})
+    endif()
   endforeach()
 
   add_test(NAME OpenEXR.bin.exrinfo