diff --git a/test/lisp/ibuffer-tests.el b/test/lisp/ibuffer-tests.el
index ff5162fefa5..c1d9ed9fc3b 100644
--- a/test/lisp/ibuffer-tests.el
+++ b/test/lisp/ibuffer-tests.el
@@ -312,8 +312,8 @@
                 (funcall create-non-file-buffer "ibuf-test-3.b" :size 50
                          :mode #'text-mode
                          :include-content "...but a multitude of drops?\n"))
-               (dirA (with-current-buffer bufA default-directory))
-               (dirB (with-current-buffer bufB default-directory)))
+               (dirA (regexp-quote (with-current-buffer bufA default-directory)))
+               (dirB (regexp-quote (with-current-buffer bufB default-directory))))
           (should (ibuffer-included-in-filters-p
                    bufA '((basename . "ibuf-test-3"))))
           (should (ibuffer-included-in-filters-p
diff --git a/test/lisp/net/tramp-tests.el b/test/lisp/net/tramp-tests.el
index 8f810818af1..19edec214f7 100644
--- a/test/lisp/net/tramp-tests.el
+++ b/test/lisp/net/tramp-tests.el
@@ -4773,8 +4773,9 @@ process sentinels.  They shall not disturb each other."
      (string-match
       (format
        "Loading %s"
-       (expand-file-name
-	"tramp-cmds" (file-name-directory (locate-library "tramp"))))
+       (regexp-quote
+        (expand-file-name
+         "tramp-cmds" (file-name-directory (locate-library "tramp")))))
       (shell-command-to-string
        (format
 	"%s -batch -Q -L %s -l tramp-sh --eval %s"