diff --git a/tests/pretty_printers.hpp b/tests/pretty_printers.hpp
index 7f19a8e..cb9962e 100644
--- a/tests/pretty_printers.hpp
+++ b/tests/pretty_printers.hpp
@@ -181,6 +181,12 @@
     return s;
 }
 
+std::ostream& operator<<(std::ostream& s, const cd_& cd)
+{
+    s << "\ncd_ {\n    " << cd.m_path << "}\n";
+    return s;
+}
+
 std::ostream& operator<<(std::ostream& s, const move_& move)
 {
     s << "\nmove_ {\n";