diff --git a/daemon/test/scripts/vars.sh b/daemon/test/scripts/vars.sh
index c07c82ef0..0fe3147b7 100644
--- a/daemon/test/scripts/vars.sh
+++ b/daemon/test/scripts/vars.sh
@@ -16,7 +16,7 @@ PREFIX=$EATMYDATA
 
 # Always use valgrind if available (unless NO_VALGRIND=1 set)
 if which valgrind >/dev/null; then :; else NO_VALGRIND=1; fi
-[ -n "$NO_VALGRIND" ] || PREFIX="$EATMYDATA valgrind -q --error-exitcode=7"
+[ -n "$NO_VALGRIND" ] || PREFIX="$EATMYDATA valgrind -q $VG_TRACE_CHILDREN --trace-children-skip=*bitcoin-cli* --error-exitcode=7"
 
 # We inject 0.01 bitcoin, but then fees (estimatefee fails and we use a
 # fee rate as per the default).
diff --git a/lightningd/test/Makefile b/lightningd/test/Makefile
index 3f5d55165..ea71bca5a 100644
--- a/lightningd/test/Makefile
+++ b/lightningd/test/Makefile
@@ -18,7 +18,7 @@ lightningd/tests: $(LIGHTNINGD_TEST_PROGRAMS:%=unittest/%)
 lightningd-test-0-basic: lightningd-test-setup-0
 
 lightningd-test-0-%:
-	NO_VALGRIND=$(NO_VALGRIND) VARIANT=0 lightningd/test/test-$*
+	NO_VALGRIND=$(NO_VALGRIND) VG_TRACE_CHILDREN="--trace-children=yes" VARIANT=0 lightningd/test/test-$*
 
 # We shutdown first in case something is left over.
 lightningd-test-setup-%: lightningd-all daemon/lightning-cli