diff --git a/build.clj b/build.clj
index 20b4273..832c7c8 100644
--- a/build.clj
+++ b/build.clj
@@ -37,19 +37,39 @@
   (b/jar {:class-dir class-dir
           :jar-file jar-file}))
 
-(defn run-tests "Run regular tests." [_]
-  (let [basis    (b/create-basis {:aliases [:test]})
-        combined (t/combine-aliases basis [:test])
+(defn- run-task
+  [aliases]
+  (println "\nRunning task for:" aliases)
+  (let [basis    (b/create-basis {:aliases aliases})
+        combined (t/combine-aliases basis aliases)
         cmds     (b/java-command {:basis     basis
                                   :java-opts (:jvm-opts combined)
                                   :main      'clojure.main
-                                  :main-args ["-m" "cognitect.test-runner"]})
+                                  :main-args (:main-opts combined)})
         {:keys [exit]} (b/process cmds)]
     (when-not (zero? exit)
-      (throw (ex-info "Tests failed" {})))))
+      (throw (ex-info (str "Task failed for: " aliases) {})))))
+
+
+(defn run-tests
+  "Run regular tests.
+
+  Optionally specify :aliases:
+  [:1.10] -- test against Clojure 1.10.3 (the default)
+  [:master] -- test against Clojure 1.11 master snapshot"
+  [{:keys [aliases] :as opts}]
+  (run-task (into [:test] aliases))
+  opts)
 
 (defn ci "Run the CI pipeline of tests (and build the JAR)." [opts]
-  (-> opts (run-tests) (clean) (jar)))
+  (-> opts
+      (as-> opts
+            (reduce (fn [opts alias]
+                      (run-tests (assoc opts :aliases [alias :runner])))
+                    opts
+                    [:1.10 :master]))
+      (clean)
+      (jar)))
 
 (defn deploy "Deploy the JAR to Clojars." [opts]
   (dd/deploy (merge {:installer :remote :artifact jar-file
diff --git a/deps.edn b/deps.edn
index 82ded8e..13218a1 100644
--- a/deps.edn
+++ b/deps.edn
@@ -9,8 +9,12 @@
                  io.github.slipset/deps-deploy {:sha "b4359c5d67ca002d9ed0c4b41b710d7e5a82e3bf"}}
           :ns-default build}
 
+  ;; versions to test against:
+  :1.10 {:override-deps {org.clojure/clojure {:mvn/version "1.10.3"}}}
+  :master {:override-deps {org.clojure/clojure {:mvn/version "1.11.1-master-SNAPSHOT"}}}
+
   ;; running tests/checks of various kinds:
-  :test {:extra-paths ["test"]
+  :test {:extra-paths ["test"] ; can also run clojure -X:test
          :extra-deps {org.clojure/test.check {:mvn/version "1.1.0"}
                       io.github.cognitect-labs/test-runner
                       {:git/tag "v0.4.0" :git/sha "334f2e2"}
@@ -44,4 +48,8 @@
                       org.apache.logging.log4j/log4j-jul {:mvn/version "2.14.1"}
                       org.apache.logging.log4j/log4j-slf4j-impl {:mvn/version "2.14.1"}}
          :jvm-opts ["-Dlog4j2.configurationFile=log4j2-info.properties"]
-         :exec-fn cognitect.test-runner.api/test}}}
+         :exec-fn cognitect.test-runner.api/test}
+
+  ;; various "runners" for tests/CI:
+  :runner
+  {:main-opts ["-m" "cognitect.test-runner"]}}}