diff --git a/tests/scripts/functions/guile b/tests/scripts/functions/guile
index 415827ae..120aaf3b 100644
--- a/tests/scripts/functions/guile
+++ b/tests/scripts/functions/guile
@@ -21,6 +21,9 @@ $details = 'This only works on systems that support it.';
 # If we don't have Guile support, never mind.
 exists $FEATURES{guile} or return -1;
 
+# Guile and Valgrind don't play together at all.
+$valgrind and return -1;
+
 # Verify simple data type conversions
 # Currently we don't support vectors:
 #    echo '$(guile (vector 1 2 3))'; \