diff --git a/test/CMakePassthroughVOLTests.cmake b/test/CMakePassthroughVOLTests.cmake
index e066f8086a1..a5d9b598fb8 100644
--- a/test/CMakePassthroughVOLTests.cmake
+++ b/test/CMakePassthroughVOLTests.cmake
@@ -49,7 +49,7 @@ endforeach ()
 
 foreach (voltest ${VOL_LIST})
   foreach (h5_file ${HDF5_REFERENCE_TEST_FILES})
-    HDFTEST_COPY_FILE("${PROJECT_SOURCE_DIR}/testfiles/${h5_file}" "${HDF5_TEST_BINARY_DIR}/${voltest}/${h5_file}" "HDF5_VOLTEST_LIB_files")
+    HDFTEST_COPY_FILE("${PROJECT_SOURCE_DIR}/testfiles/${h5_file}" "${PROJECT_BINARY_DIR}/${voltest}/${h5_file}" "HDF5_VOLTEST_LIB_files")
   endforeach ()
 endforeach ()