diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..5379433
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,41 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  test-solutions:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macOS-latest]
+      fail-fast: false
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Prepare java
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'zulu'
+          java-version: '17'
+
+      - name: Install Clojure
+        uses: DeLaGuardo/setup-clojure@12.1
+        with:
+          cli: '1.10.3.1013'
+
+      - name: Cache clojure dependencies
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.m2/repository
+            ~/.gitlibs
+            ~/.deps.clj
+          # List all files containing dependencies:
+          key: cljdeps-${{ hashFiles('deps.edn') }}
+          restore-keys: cljdeps-
+
+      - name: Test solutions
+        run: clojure -M clojure/tests/solutions_tests.clj
diff --git a/clojure/tests/solutions_tests.clj b/clojure/tests/solutions_tests.clj
index 1126886..94cd266 100644
--- a/clojure/tests/solutions_tests.clj
+++ b/clojure/tests/solutions_tests.clj
@@ -4,7 +4,7 @@
             day11 day12 day13 day14 day15
             day16 day17 day18 day19 day20
             day21 day22 day23 day24 day25
-            [clojure.test :refer [deftest are run-tests]]))
+            [clojure.test :refer [deftest are run-tests successful?]]))
 
 
 (defmacro check-day [day test-results real-results]
@@ -64,4 +64,6 @@
 (check-day 25 "2=-1=0" "122-2=200-0111--=200")
 
 
-(run-tests)
+(let [summ (run-tests)]
+  (when-not (successful? summ)
+    (throw (Exception. "tests failed"))))