diff --git a/.github/workflows/main-tests.yml b/.github/workflows/main-tests.yml
index faa64d6c..af8717b7 100644
--- a/.github/workflows/main-tests.yml
+++ b/.github/workflows/main-tests.yml
@@ -5,7 +5,7 @@ jobs:
   tests:
     strategy:
       matrix:
-        java: ['17', '18', '19']
+        java: ['17', '19', '21']
         os: [ubuntu-latest]
 
     runs-on: ${{ matrix.os }}
diff --git a/project.clj b/project.clj
index a2d8824d..20f8aae2 100644
--- a/project.clj
+++ b/project.clj
@@ -18,6 +18,7 @@
   :profiles
   {;; :default [:base :system :user :provided :dev]
    :provided {:dependencies [[org.clojure/clojure "1.11.1"]]}
+   :c1.12    {:dependencies [[org.clojure/clojure "1.12.0-alpha8"]]}
    :c1.11    {:dependencies [[org.clojure/clojure "1.11.1"]]}
    :c1.10    {:dependencies [[org.clojure/clojure "1.10.1"]]}
    :c1.9     {:dependencies [[org.clojure/clojure "1.9.0"]]}
@@ -62,6 +63,6 @@
    ;; "build-once" ["do" ["clean"] ["cljsbuild" "once"]]
    "deploy-lib"    ["do" #_["build-once"] ["deploy" "clojars"] ["install"]]
 
-   "test-clj"     ["with-profile" "+c1.11:+c1.10:+c1.9" "test"]
-   ;; "test-cljs" ["with-profile" "+test" "cljsbuild"   "test"]
+   "test-clj"     ["with-profile" "+c1.12:+c1.11:+c1.10:+c1.9" "test"]
+   ;; "test-cljs" ["with-profile" "+test" "cljsbuild"          "test"]
    "test-all"     ["do" ["clean"] ["test-clj"] #_["test-cljs"]]})