diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index 2bfe2a0..6c457f5 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -17,7 +17,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macOS-latest]
+        os: [ubuntu-latest, ubuntu-16.04]
       fail-fast: false
     runs-on: ${{ matrix.os }}
     steps:
@@ -61,7 +61,7 @@ jobs:
   test-save:
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macOS-latest]
+        os: [ubuntu-latest, ubuntu-16.04]
       fail-fast: false
     runs-on: ${{ matrix.os }}
     steps:
@@ -84,7 +84,7 @@ jobs:
     needs: test-save
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macOS-latest]
+        os: [ubuntu-latest, ubuntu-16.04]
       fail-fast: false
     runs-on: ${{ matrix.os }}
     steps: