Index: tests/catch2/catch.hpp
--- tests/catch2/catch.hpp.orig
+++ tests/catch2/catch.hpp
@@ -0,0 +1,14 @@
+#ifndef __OPENBSD_PORT_COMPAT_CATCH2__
+#define __OPENBSD_PORT_COMPAT_CATCH2__
+
+#include <catch2/catch_all.hpp>
+#include <random>
+
+using Catch::Approx;
+
+namespace Catch {
+	using Catch::Matchers::Equals;
+	using Catch::Matchers::MatcherBase;
+};
+
+#endif // __OPENBSD_PORT_COMPAT_CATCH2__
