--- a/tests/meson.build
+++ b/tests/meson.build
@@ -82,8 +82,8 @@
   'aero.gif',
 ]
 
-installed_test_bindir = join_paths(gdk_pixbuf_libexecdir, 'installed-tests', gdk_pixbuf_api_name)
-installed_test_datadir = join_paths(gdk_pixbuf_datadir, 'installed-tests', gdk_pixbuf_api_name)
+installed_test_bindir = join_paths('@installedtestsprefix@', 'libexec', 'installed-tests', gdk_pixbuf_api_name)
+installed_test_datadir = join_paths('@installedtestsprefix@', 'share', 'installed-tests', gdk_pixbuf_api_name)
 
 install_data(test_data, install_dir: installed_test_bindir)