diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index dcd49f9..9dcdf1d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -14,15 +14,26 @@ concurrency:
 jobs:
   test:
     runs-on: ${{ matrix.os }}
+    continue-on-error: ${{ matrix.experimental }}
     strategy:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
         emacs-version:
-          - 26.3
-          - 27.2
           - 28.2
-          - snapshot
+          - 29.4
+          - 30.1
+        experimental: [false]
+        include:
+        - os: ubuntu-latest
+          emacs-version: snapshot
+          experimental: true
+        - os: macos-latest
+          emacs-version: snapshot
+          experimental: true
+        - os: windows-latest
+          emacs-version: snapshot
+          experimental: true
 
     steps:
     - uses: actions/checkout@v3
diff --git a/Eask b/Eask
index 63049b1..0245b5c 100644
--- a/Eask
+++ b/Eask
@@ -1,3 +1,5 @@
+;; -*- mode: eask; lexical-binding: t -*-
+
 (package "trinary" "1.2.1" "Trinary logic.")
 
 (website-url "https://github.com/emacs-elsa/trinary-logic")