diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 08840a4..94c96c9 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,14 +1,16 @@
 name: Test and build docs
 
-on: push
+on: 
+  - push 
+  - pull_request
 
 jobs:
   test:
    name: Run Unittest
-   runs-on: ubuntu-20.04
+   runs-on: ubuntu-22.04
    strategy:
     matrix:
-      python: ['3.6', '3.7', '3.8', '3.9', '3.10']
+      python: ['3.9', '3.10', '3.11', '3.12']
 
    steps:
       - name: Checkout
@@ -78,7 +80,7 @@ jobs:
 
   release:
     name: Create Github release
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     needs: test
     if: startsWith(github.event.ref, 'refs/tags/v') && endsWith(github.event.ref, '.0')
 
@@ -94,7 +96,7 @@ jobs:
 
   publish:
     name: Publish to PyPi
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     needs: test
     if: startsWith(github.event.ref, 'refs/tags/v')
 
@@ -118,7 +120,7 @@ jobs:
 
   ci_develop:
     name: Print Github Context for Development
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     if: true
 
     steps:
diff --git a/requirements.unittest.3.6.txt b/requirements.unittest.3.11.txt
similarity index 100%
rename from requirements.unittest.3.6.txt
rename to requirements.unittest.3.11.txt
diff --git a/requirements.unittest.3.7.txt b/requirements.unittest.3.12.txt
similarity index 100%
rename from requirements.unittest.3.7.txt
rename to requirements.unittest.3.12.txt
diff --git a/requirements.unittest.3.8.txt b/requirements.unittest.3.8.txt
deleted file mode 100644
index 29546ab..0000000
--- a/requirements.unittest.3.8.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-pytest
-pytest-cov
-pytest-depends
-pykrige
-gstools>=1.3
-plotly