diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 09582eed9..76438ec73 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,6 +26,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ["ubuntu-latest", "windows-2022"]
+        python: ${{ (github.event_name == 'pull_request' && fromJSON('["3.8", "3.11"]')) || fromJSON('["3.8", "3.9", "3.10", "3.11"]') }}
         type: ["cli",
                "dapp",
                "data_dependency",
@@ -53,10 +54,10 @@ jobs:
             type: truffle
     steps:
       - uses: actions/checkout@v3
-      - name: Set up Python 3.8
+      - name: Set up Python ${{ matrix.python }}
         uses: actions/setup-python@v3
         with:
-          python-version: 3.8
+          python-version: ${{ matrix.python }}
       - name: Install dependencies
         run: |
           pip install ".[test]"
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a003eb168..b3754bfd7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -25,12 +25,13 @@ jobs:
       matrix:
         os: ["ubuntu-latest", "windows-2022"]
         type: ["unit", "integration", "tool"]
+        python: ${{ (github.event_name == 'pull_request' && fromJSON('["3.8", "3.11"]')) || fromJSON('["3.8", "3.9", "3.10", "3.11"]') }}
     steps:
       - uses: actions/checkout@v3
-      - name: Set up Python 3.8
+      - name: Set up Python ${{ matrix.python }}
         uses: actions/setup-python@v4
         with:
-          python-version: 3.8
+          python-version: ${{ matrix.python }}
           cache: "pip"
           cache-dependency-path: setup.py
 
@@ -74,7 +75,7 @@ jobs:
         uses: ./.github/actions/upload-coverage
         # only aggregate test coverage over linux-based tests to avoid any OS-specific filesystem information stored in
         # coverage metadata.
-        if: ${{ matrix.os == 'ubuntu-latest' }}
+        if: ${{ matrix.os == 'ubuntu-latest' && matrix.python == '3.8' }}
 
   coverage:
     needs:
diff --git a/slither/utils/loc.py b/slither/utils/loc.py
index 0e51dfa46..dde91578b 100644
--- a/slither/utils/loc.py
+++ b/slither/utils/loc.py
@@ -1,4 +1,4 @@
-from dataclasses import dataclass
+from dataclasses import dataclass, field
 from pathlib import Path
 from typing import List, Tuple
 
@@ -19,9 +19,9 @@ class LoCInfo:
 
 @dataclass
 class LoC:
-    src: LoCInfo = LoCInfo()
-    dep: LoCInfo = LoCInfo()
-    test: LoCInfo = LoCInfo()
+    src: LoCInfo = field(default_factory=LoCInfo)
+    dep: LoCInfo = field(default_factory=LoCInfo)
+    test: LoCInfo = field(default_factory=LoCInfo)
 
     def to_pretty_table(self) -> MyPrettyTable:
         table = MyPrettyTable(["", "src", "dep", "test"])