diff --git a/.github/workflows/amd64.yml b/.github/workflows/amd64.yml
index 48c7fe84..d3780e87 100644
--- a/.github/workflows/amd64.yml
+++ b/.github/workflows/amd64.yml
@@ -11,7 +11,7 @@ env:
 jobs:
   ubuntu-latest:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v4
@@ -19,7 +19,7 @@ jobs:
       run: cargo build --all-features --verbose
     - name: Run tests
       run: |
-        sudo apt update && sudo apt install -y gdb pip curl python3.10-dev llvm \
+        sudo apt update && sudo apt install -y gdb pip curl python3.9-dev llvm \
             openjdk-17-jdk ca-certificates gnupg
         pip3 install atheris
         sudo mkdir -p /etc/apt/keyrings
diff --git a/.github/workflows/coverage.yaml b/.github/workflows/coverage.yaml
index 9d806814..bdb774f3 100644
--- a/.github/workflows/coverage.yaml
+++ b/.github/workflows/coverage.yaml
@@ -11,13 +11,13 @@ env:
 jobs:
   ubuntu-latest:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v4
     - name: Install Dependences
       run: |
-        sudo apt update && sudo apt install -y gdb pip curl python3.10-dev llvm \
+        sudo apt update && sudo apt install -y gdb pip curl python3.9-dev llvm \
             openjdk-17-jdk ca-certificates gnupg
         pip3 install atheris
         sudo mkdir -p /etc/apt/keyrings
diff --git a/casr/tests/tests.rs b/casr/tests/tests.rs
index 4f5fbf88..b29d9a20 100644
--- a/casr/tests/tests.rs
+++ b/casr/tests/tests.rs
@@ -4233,7 +4233,6 @@ fn test_casr_java() {
 }
 
 #[test]
-#[ignore]
 #[cfg(target_arch = "x86_64")]
 fn test_casr_java_native_lib() {
     let paths = [