diff --git a/.github/workflows/ci-trunk.yml b/.github/workflows/ci-trunk.yml
new file mode 100644
index 00000000..e7141a41
--- /dev/null
+++ b/.github/workflows/ci-trunk.yml
@@ -0,0 +1,34 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - dev
+      - master
+  pull_request:
+    branches:
+      - master
+      - dev
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        # Select platform(s)
+        os: [ ubuntu-latest, macos-latest, windows-latest ]
+        # Select compatible Smalltalk image(s)
+        smalltalk: [ Squeak64-trunk]
+    name: ${{ matrix.smalltalk }} on ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: hpi-swa/setup-smalltalkCI@v1
+        with:
+          smalltalk-version: ${{ matrix.smalltalk }}
+      - run: smalltalkci -s ${{ matrix.smalltalk }} .smalltalk.trunk.ston
+        shell: bash
+        timeout-minutes: 15
+        env:
+          # for uploading coverage reports
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4de33f86..c1ed0ce4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
         # Select platform(s)
         os: [ ubuntu-latest, macos-latest, windows-latest ]
         # Select compatible Smalltalk image(s)
-        smalltalk: [ Squeak64-trunk, Squeak64-5.3 ]
+        smalltalk: [ Squeak64-5.3 ]
     name: ${{ matrix.smalltalk }} on ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2
diff --git a/.smalltalk.trunk.ston b/.smalltalk.trunk.ston
new file mode 100644
index 00000000..38f94d5f
--- /dev/null
+++ b/.smalltalk.trunk.ston
@@ -0,0 +1,19 @@
+SmalltalkCISpec {
+  #loading : [
+    SCIMetacelloLoadSpec {
+      #baseline : 'SVGMorph',
+      #directory : 'packages',
+      #platforms : [ #squeak ],
+      #load : [ 'tests' ],
+      #useLatestMetacello : true
+    }
+  ],
+  #preLoading : [
+    'scripts/preLoading.st'
+  ],
+  #testing : {
+    #coverage : {
+      #packages : [ 'SVG-Morphic', 'SVG-Editor']
+    }
+  }
+}