diff --git a/json.spec b/json.spec
index e44efe4..85f97be 100644
--- a/json.spec
+++ b/json.spec
@@ -44,7 +44,7 @@ mkdir -p %{_target_platform}
 sed -i 's@lib/@%{_libdir}/@g' CMakeLists.txt
 
 # Some tests are broken: https://github.com/nlohmann/json/issues/887
-rm -f test/src/unit-regression.cpp
+sed -e '/unit-regression/d' -i test/CMakeLists.txt
 
 %build
 pushd %{_target_platform}