diff --git a/ChangeLog b/ChangeLog
index 79e0d1bcdd..b04cfe7703 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,6 +4,7 @@
 	Don't import non-used modules
 	* testsuite/Makefile.am:
 	Heavy valgrinding por favor !
+	(%.valgrind): with always-malloc for GSlice
 
 2006-06-09  Edward Hervey  <edward@fluendo.com>
 
diff --git a/testsuite/Makefile.am b/testsuite/Makefile.am
index edfc128518..31e7b51de9 100644
--- a/testsuite/Makefile.am
+++ b/testsuite/Makefile.am
@@ -65,6 +65,7 @@ TESTS_ENVIRONMENT = PYTHONPATH=$(top_srcdir)/:$(PYTHONPATH)
 # valgrind any given test_x.py by running make test_x.py.valgrind
 %.valgrind: %
 	$(TESTS_ENVIRONMENT)                                    \
+	G_SLICE=always-malloc					\
 	$(VALGRIND_PATH) -q					\
 	--suppressions=$(GSTSUPP)				\
 	--suppressions=$(PYTHONSUPP)				\