diff --git a/.github/workflows/linting_and_testing.yml b/.github/workflows/linting_and_testing.yml
index aa0ab6e..caabd77 100644
--- a/.github/workflows/linting_and_testing.yml
+++ b/.github/workflows/linting_and_testing.yml
@@ -39,8 +39,8 @@ jobs:
 
       - name: Remove all micromamba installations
         run: |
-          rm -rf /home/user/.bash_profile /home/user/.conda /home/user/micromamba /home/user/micromamba-bin 2>/dev/null
-          touch /home/user/.bash_profile
+          rm -rf $HOME/.bash_profile $HOME/.conda $HOME/micromamba $HOME/micromamba-bin 2>/dev/null
+          touch $HOME/.bash_profile
 
       - name: setup-micromamba
         uses: mamba-org/setup-micromamba@v2.0.0
diff --git a/.github/workflows/pr-tests.yml b/.github/workflows/pr-tests.yml
new file mode 100644
index 0000000..e2abe39
--- /dev/null
+++ b/.github/workflows/pr-tests.yml
@@ -0,0 +1,87 @@
+name: PR Tests
+
+# Trigger the workflow on pull request events
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  pr_test:
+    strategy:
+      matrix:
+        os: [self-hosted]
+        python-version: ["3.10"]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+
+      - run: echo "Repository -> ${{ github.repository }}"
+      - run: echo "Branch -> ${{ github.ref }}"
+      - run: echo "Trigger event -> ${{ github.event_name }}"
+      - run: echo "Runner OS -> ${{ runner.os }}"
+
+      - name: List files in the repository
+        run: |
+          ls ${{ github.workspace }}
+
+      - name: Remove all micromamba installations
+        run: |
+          rm -rf $HOME/.bash_profile $HOME/.conda $HOME/micromamba $HOME/micromamba-bin 2>/dev/null
+          touch $HOME/.bash_profile
+
+      - name: setup-micromamba
+        uses: mamba-org/setup-micromamba@v2.0.0
+        with:
+          generate-run-shell: true
+          micromamba-version: '2.0.2-2'
+          post-cleanup: 'all'
+          init-shell: bash
+          environment-file: .github/env.yaml
+          create-args: >-
+            python=${{ matrix.python-version }}
+            pytest
+            pytest-cov
+            pytest-html
+            flake8
+            pip
+
+      - name: List installed package versions
+        shell: bash -l {0}
+        run: micromamba list
+
+      - name: Checkout biobb_common
+        uses: actions/checkout@v4
+        with:
+          repository: bioexcel/biobb_common
+          path: './biobb_common'
+
+      - name: Run tests
+        shell: bash -l {0}
+        run: |
+          # Ignoring docker and singularity tests
+          export PYTHONPATH=.:./biobb_common:$PYTHONPATH
+
+          # Create directory for tests reports
+          mkdir -p ./reports/junit
+
+          # Production one
+          pytest biobb_gromacs/test/unitests/ --ignore-glob=*container.py --ignore-glob=*docker.py --ignore-glob=*singularity.py
+
+      # Notify user about test results
+      - name: Comment on PR
+        if: always() # This ensures the step runs even if tests fail
+        uses: actions/github-script@v6
+        with:
+          script: |
+            const { payload, repo } = context; // Access GitHub context
+            const prNumber = payload.pull_request.number;
+            const jobStatus = '${{ job.status }}'; // Get job status (success/failure)
+            const testStatus = jobStatus === 'success' ? '✅ Tests Passed!' : '❌ Tests Failed.';
+            
+            await github.rest.issues.createComment({
+              owner: repo.owner,
+              repo: repo.repo,
+              issue_number: prNumber,
+              body: `**Test Results for PR #${prNumber}**\n\n${testStatus}`
+            });
\ No newline at end of file
diff --git a/biobb_gromacs/gromacs/genion.py b/biobb_gromacs/gromacs/genion.py
index 30060f9..66c4687 100755
--- a/biobb_gromacs/gromacs/genion.py
+++ b/biobb_gromacs/gromacs/genion.py
@@ -160,8 +160,7 @@ def launch(self) -> int:
         ]
 
         if (
-            self.stage_io_dict["in"].get("input_ndx_path")
-            and Path(self.stage_io_dict["in"].get("input_ndx_path")).exists()
+            self.stage_io_dict["in"].get("input_ndx_path") and Path(self.stage_io_dict["in"].get("input_ndx_path")).exists()
         ):
             self.cmd.append("-n")
             self.cmd.append(self.stage_io_dict["in"].get("input_ndx_path"))
diff --git a/biobb_gromacs/gromacs_extra/append_ligand.py b/biobb_gromacs/gromacs_extra/append_ligand.py
index c45a143..5868a9b 100755
--- a/biobb_gromacs/gromacs_extra/append_ligand.py
+++ b/biobb_gromacs/gromacs_extra/append_ligand.py
@@ -124,9 +124,7 @@ def launch(self) -> int:
             top_lines.insert(index + 6, "#ifdef " + self.posres_name + "\n")
             top_lines.insert(
                 index + 7,
-                '#include "'
-                + str(Path(self.io_dict["in"].get("input_posres_itp_path", "")).name)
-                + '"\n',
+                '#include "' + str(Path(self.io_dict["in"].get("input_posres_itp_path", "")).name) + '"\n',
             )
             top_lines.insert(index + 8, "#endif" + "\n")
             top_lines.insert(index + 9, "\n")
@@ -153,9 +151,7 @@ def launch(self) -> int:
                 inside_molecules_section = True
                 continue
             if (
-                inside_molecules_section
-                and not line.startswith(";")
-                and line.upper().startswith("PROTEIN")
+                inside_molecules_section and not line.startswith(";") and line.upper().startswith("PROTEIN")
             ):
                 index_molecule = index