diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 56d46959..f526676d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -18,14 +18,14 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        emacs_version: [26.3, 27.2, 28.2, 29.1]
-        python-version: [3.7]
+        emacs_version: [27.2, 28.2, 29.1]
+        python-version: [3.8]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -34,13 +34,13 @@ jobs:
       with:
         version: ${{ matrix.emacs_version }}
 
-    - uses: actions/cache@v2
+    - uses: actions/cache@v4
       id: cache-cask-packages
       with:
         path: .cask
         key: cache-cask-packages-001
 
-    - uses: actions/cache@v2
+    - uses: actions/cache@v4
       id: cache-cask-executable
       with:
         path: ~/.cask
diff --git a/lisp/poly-ein.el b/lisp/poly-ein.el
index ca190aac..b770f22f 100644
--- a/lisp/poly-ein.el
+++ b/lisp/poly-ein.el
@@ -351,13 +351,13 @@ TYPE can be \\='body, nil."
                   (apply-partially #'poly-ein--narrow-to-inner #'identity))))
 
 (defun poly-ein--record-window-buffer ()
-  "(pm--visible-buffer-name) needs to get onto window's prev-buffers.
+  "(pm--buffer-name) needs to get onto window's prev-buffers.
 But `C-x b` seems to consult `buffer-list' and not the C (window)->prev_buffers."
   (when (buffer-base-buffer)
     (let* ((buffer-list (frame-parameter nil 'buffer-list))
            (pos-visible (seq-position
                          buffer-list
-                         (pm--visible-buffer-name)
+                         (pm--buffer-name)
                          (lambda (x visible*)
                            (string-prefix-p (buffer-name x) visible*)))))
       ;; no way to know if i've switched in or out of indirect buf.
@@ -382,7 +382,7 @@ But `C-x b` seems to consult `buffer-list' and not the C (window)->prev_buffers.
   (add-hook 'ido-make-buffer-list-hook
 	    (lambda ()
 	      (defvar ido-temp-list)
-	      (when-let ((visible (pm--visible-buffer-name)))
+	      (when-let ((visible (pm--buffer-name)))
 		(ido-to-end (delq nil
 				  (mapcar (lambda (x)
 					    (when (string-prefix-p x visible) x))