diff --git a/.github/workflows/ci-tests.yml b/.github/workflows/ci-tests.yml
index 6b995efc..568be210 100644
--- a/.github/workflows/ci-tests.yml
+++ b/.github/workflows/ci-tests.yml
@@ -25,6 +25,8 @@ jobs:
         java: [15] #  8, 11.0.x,
 
     steps:
+      - name: remove unwanted preinstalled java
+        run: sudo rm -rf /usr/lib/jvm/*
       - uses: actions/checkout@v2
       - name: Setup java
         uses: actions/setup-java@v1