diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e62ad9fddb..90e7b69d33 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -63,12 +63,13 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: |
-            3.7
             3.8
             3.9
             3.10
             3.11
             3.12
+            3.13
+          allow-prereleases: true
         if: matrix.os != 'macos-latest'
       - name: Setup Python Versions
         uses: actions/setup-python@v5
@@ -77,6 +78,8 @@ jobs:
             3.10
             3.11
             3.12
+            3.13
+          allow-prereleases: true
         if: matrix.os == 'macos-latest'
       - name: Setup Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
diff --git a/news/3176.bugfix.md b/news/3176.bugfix.md
new file mode 100644
index 0000000000..40557f0bb3
--- /dev/null
+++ b/news/3176.bugfix.md
@@ -0,0 +1 @@
+Call functions from shared library in the in-process `env_spec.py` script.
diff --git a/tests/test_integration.py b/tests/test_integration.py
index 5fd342498b..55deccd534 100644
--- a/tests/test_integration.py
+++ b/tests/test_integration.py
@@ -3,7 +3,7 @@
 
 from pdm.utils import cd
 
-PYTHON_VERSIONS = ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+PYTHON_VERSIONS = ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 PYPROJECT = {
     "project": {"name": "test-project", "version": "0.1.0", "requires-python": ">=3.7"},
     "build-system": {"requires": ["pdm-backend"], "build-backend": "pdm.backend"},
diff --git a/tox.ini b/tox.ini
index e12ae8eb9d..9a7d00c628 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 # https://pypi.org/project/tox-pdm/ is needed to run this tox configuration
 [tox]
-envlist = py3{8,9,10,11,12}
+envlist = py3{8,9,10,11,12,13}
 passenv = LD_PRELOAD
 isolated_build = True