diff --git a/tests/Makefile.am b/tests/Makefile.am
index e8a36ac..a4da757 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -79,7 +79,8 @@ LOG_COMPILER= $(SHELL)

 built_programs =							\
   echo 'spy:;@echo $$(PROGRAMS)'					\
-    | (cd ../src && MAKEFLAGS= $(MAKE) -s -f Makefile -f - spy)		\
-    | tr ' ' '\n' | sed '/^$$/d; s,$(EXEEXT)$$,,' | sort -u
+    | { (cd ../src && MAKEFLAGS= $(MAKE) -s -f Makefile -f - spy)	\
+    | tr ' ' '\n' | sed '/^$$/d; s,$(EXEEXT)$$,,' | sort -u		\
+    | tr '\n' ' '; echo; } | sed 's/ $$//'

 VERBOSE = yes