diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f4825a672..c8ee3ab07 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,8 +8,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-18.04, macOS-latest, windows-latest]
-        java: [8, 11, 15]
+        os: [ubuntu-18.04, windows-latest]
+        java: [8]
       fail-fast: false
       max-parallel: 4
     name: Test JDK ${{ matrix.java }}, ${{ matrix.os }}