diff --git a/ChangeLog b/ChangeLog
index d5146f349..40702f685 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2004-11-28  Alexandre Duret-Lutz  <adl@src.lip6.fr>
 
+	* wrap/python/tests/run.in: Do not override PYTHONPATH, just add
+	to it.
+	Report from Akim Demaille.
+
 	* src/sanity/style.test: Make sure grep supports the options put
 	into GREP_OPTIONS.
 
diff --git a/wrap/python/tests/run.in b/wrap/python/tests/run.in
index 9e3970efc..64d92c19f 100644
--- a/wrap/python/tests/run.in
+++ b/wrap/python/tests/run.in
@@ -30,12 +30,14 @@ test -n "$srcdir" && test -z "$VERBOSE" && exec >/dev/null 2>&1
 # path of dependent libraries in each library).
 modpath='../.libs:@top_builddir@/src/.libs:@top_builddir@/buddy/src/.libs'
 
+pypath='..:@srcdir@/..:$PYTHONPATH'
+
 test -z "$1" &&
-  PYTHONPATH='..:@srcdir@/..' DYLD_LIBRARY_PATH=$modpath exec @PYTHON@
+  PYTHONPATH=$pypath DYLD_LIBRARY_PATH=$modpath exec @PYTHON@
 
 case $1 in
   *.py)
-    PYTHONPATH='..:@srcdir@/..' DYLD_LIBRARY_PATH=$modpath exec @PYTHON@ "$@";;
+    PYTHONPATH=$pypath DYLD_LIBRARY_PATH=$modpath exec @PYTHON@ "$@";;
   *.test)
     exec sh -x "$@";;
   *)