The variable TESTPATH should be initialized to empty.
The test code is now accessed as a package.
diff --git a/Modules/Setup.in b/Modules/Setup.in
index d6a9359..7f38d9f 100644
--- a/Modules/Setup.in
+++ b/Modules/Setup.in
@@ -71,7 +71,7 @@
 SITEPATH=
 
 # Standard path components for test modules
-TESTPATH=:test
+TESTPATH=
 
 # Path components for machine- or system-dependent modules and shared libraries
 MACHDEPPATH=:plat-$(MACHDEP)