DEVELOPERS.md: remove reference to 'rtest'

This directory was removed in 0e19cdb9bff60fdeb1942f5dca677db9d8a24062.

diff --git a/DEVELOPERS.md b/DEVELOPERS.md
index e425e397d0f50f775e1c93f83bcdbd77b15cea53..f17ca45d6d4440bf9092780a3a7962bf3a6a3409 100644 (file)
--- a/DEVELOPERS.md
+++ b/DEVELOPERS.md
@@ -82,7 +82,7 @@ follows:
 env PATH=${PREFIX}/bin:${PATH} C_INCLUDE_PATH=${PREFIX}/include \
   LD_LIBRARY_PATH=${PREFIX}/lib LIBRARY_PATH=${PREFIX}/lib \
   PYTHONPATH=${PREFIX}/lib/graphviz/python3 \
-  python3 -m pytest tests rtest --verbose
+  python3 -m pytest tests --verbose
 ```
 
 On macOS, use the same command except replacing `LD_LIBRARY_PATH` with