diff --git a/CMakeLists.txt b/CMakeLists.txt
index ea6b80e..de7717c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -65,8 +65,8 @@ if(UTF8PROC_ENABLE_TESTING)
   enable_testing()
   file(MAKE_DIRECTORY data)
   set(UNICODE_VERSION 13.0.0)
-  file(DOWNLOAD https://www.unicode.org/Public/${UNICODE_VERSION}/ucd/NormalizationTest.txt data/NormalizationTest.txt SHOW_PROGRESS)
-  file(DOWNLOAD https://www.unicode.org/Public/${UNICODE_VERSION}/ucd/auxiliary/GraphemeBreakTest.txt data/GraphemeBreakTest.txt SHOW_PROGRESS)
+  file(DOWNLOAD https://www.unicode.org/Public/${UNICODE_VERSION}/ucd/NormalizationTest.txt ${CMAKE_BINARY_DIR}/data/NormalizationTest.txt SHOW_PROGRESS)
+  file(DOWNLOAD https://www.unicode.org/Public/${UNICODE_VERSION}/ucd/auxiliary/GraphemeBreakTest.txt ${CMAKE_BINARY_DIR}/data/GraphemeBreakTest.txt SHOW_PROGRESS)
   add_executable(case test/tests.h test/tests.c utf8proc.h test/case.c)
   target_link_libraries(case utf8proc)
   add_executable(custom test/tests.h test/tests.c utf8proc.h test/custom.c)