diff --git a/firefox.spec b/firefox.spec
index 9e4a476..5c2ed21 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -708,7 +708,7 @@ make -C objdir buildsymbols
 
 %if 0%{?run_firefox_tests}
 tar xf %{SOURCE37} -C "objdir/_virtualenvs/init_py3/lib64/python3.9"
-cp {SOURCE40} {SOURCE38} {SOURCE39} .
+cp %{SOURCE40} %{SOURCE38} %{SOURCE39} .
 ./run-tests
 ./print_results > test_summary.txt 2>&1
 %endif