Index: src/tests/Makefile.am
===================================================================
--- src/tests/Makefile.am	(revision 65deb18a7ffff4dccefdf2611afde3cadd19efb0)
+++ src/tests/Makefile.am	(revision f792cb8b86c581d70e5ef5363e56f8cec6130951)
@@ -68,5 +68,5 @@
 
 concurrency :
-	@+python test.py --debug=${debug} ${concurrent} ${concurrent_test}
+	@+python test.py --debug=${debug} -Iconcurrent
 
 .dummy : .dummy.c @CFA_BINDIR@/@CFA_NAME@
Index: src/tests/Makefile.in
===================================================================
--- src/tests/Makefile.in	(revision 65deb18a7ffff4dccefdf2611afde3cadd19efb0)
+++ src/tests/Makefile.in	(revision f792cb8b86c581d70e5ef5363e56f8cec6130951)
@@ -819,5 +819,5 @@
 
 concurrency :
-	@+python test.py --debug=${debug} ${concurrent} ${concurrent_test}
+	@+python test.py --debug=${debug} -Iconcurrent
 
 .dummy : .dummy.c @CFA_BINDIR@/@CFA_NAME@