diff --git a/test/lib/library.exp b/test/lib/library.exp
index ade7873d..f9895d88 100644
--- a/test/lib/library.exp
+++ b/test/lib/library.exp
@@ -596,8 +596,8 @@ proc save_env {{file ""}} {
 # @param string  File to save the environment to.  Default is "$TESTDIR/tmp/env1~".
 # @see assert_env_unmodified()
 proc _save_env {{file ""}} {
-    assert_bash_exec "{ set; declare -F; } > $file"
-}; # save_env()
+    assert_bash_exec "{ set; declare -F; shopt -p; } > $file"
+}; # _save_env()
 
 
 # Source bash_completion package