diff --git a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/funcs/tst.basename.d b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/funcs/tst.basename.d
index 6fb996c96181..d417801f58ed 100644
--- a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/funcs/tst.basename.d
+++ b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/funcs/tst.basename.d
@@ -27,6 +27,7 @@
 #pragma ident	"%Z%%M%	%I%	%E% SMI"
 
 #pragma D option quiet
+#pragma D option dynvarsize=2m
 
 /*
  * This test verifies that the basename() and dirname() functions are working