diff --git a/gnulib b/gnulib
index 204e7feaf..34ccc0097 160000
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 204e7feaf617b2e14fdf1226dfaf858e984c1737
+Subproject commit 34ccc0097f0161afab82df3025b342d98ad63f01
diff --git a/tests/init.sh b/tests/init.sh
index 1c0b4b4f1..05a983a45 100644
--- a/tests/init.sh
+++ b/tests/init.sh
@@ -98,7 +98,7 @@ test -n "$EXEEXT" && shopt -s expand_aliases
 # This is cheap and useful for exposing code that depends on the fact that
 # malloc-related functions often return memory that is mostly zeroed.
 # If you have the time and cycles, use valgrind to do an even better job.
-${MALLOC_PERTURB_=87}
+: ${MALLOC_PERTURB_=87}
 export MALLOC_PERTURB_
 
 # We use a trap below for cleanup.  This requires us to go through