diff --git a/.github/actions/spelling/expect.txt b/.github/actions/spelling/expect.txt
index fa99ca81..be197e1d 100644
--- a/.github/actions/spelling/expect.txt
+++ b/.github/actions/spelling/expect.txt
@@ -844,6 +844,7 @@ lyuryev
 lz
 machdep
 machineid
+macos
 MACROFILE
 MADV
 madvise
@@ -1695,6 +1696,7 @@ unmap
 unmapping
 Unpoisoning
 unregister
+unshallow
 unspill
 unspilling
 unsync
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..68681f3b
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,18 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+#, windows-latest
+        os: [ubuntu-latest, macos-latest, ubuntu-16.04]
+    steps:
+    - uses: actions/checkout@v2
+    - name: fetch tags
+      run: git fetch --unshallow --tags --prune
+    - name: make check
+      run: make --keep-going all && MALLOC_CHECK_=7 MALLOC_PERTURB_=42 make --keep-going check
+      shell: bash
diff --git a/.github/workflows/spelling.yml b/.github/workflows/spelling.yml
index 43219140..78aa3ff1 100644
--- a/.github/workflows/spelling.yml
+++ b/.github/workflows/spelling.yml
@@ -4,10 +4,9 @@ on:
 
 jobs:
   build:
-    name: Spell checking
     runs-on: ubuntu-20.04
     steps:
-    - uses: actions/checkout@v2.0.0
+    - uses: actions/checkout@v2
       with:
         fetch-depth: 5
     - uses: check-spelling/check-spelling@prerelease