diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index c399e5bcb..86b53a3f1 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -5,7 +5,8 @@ set(SHA "bda76f96666405f72abef56ad4d7d5b93ca153cd7d675853fbdb199096949f8a")
 string(SUBSTRING ${SHA} 0 6 SHORTSHA)
 set(TAR "gdasapp-fix-${SHORTSHA}.tgz")
 IF(DEFINED ENV{GDASAPP_UNIT_TEST_DATA_PATH})
-  file(COPY ENV{GDASAPP_UNIT_TEST_DATA_PATH}/${TAR} ${CMAKE_CURRENT_BINARY_DIR}/${TAR})
+  set(GDASAPP_UNIT_TEST_DATA_PATH "$ENV{GDASAPP_UNIT_TEST_DATA_PATH}")
+  file(COPY ${GDASAPP_UNIT_TEST_DATA_PATH}/${TAR} DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
 ELSE()
   # download test files
   file(DOWNLOAD