diff --git a/.github/workflows/test-docs.yml b/.github/workflows/test-docs.yml
index 9a564c70..7e14560f 100644
--- a/.github/workflows/test-docs.yml
+++ b/.github/workflows/test-docs.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     services:
       postgres:
-        image: postgis/postgis:13-3.4
+        image: postgis/postgis:14-3.4
         ports:
           - 5432:5432
         env:
diff --git a/pyproject.toml b/pyproject.toml
index e8b1169e..f0913814 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ classifiers = [
   "Programming Language :: Python :: 3.12",
 ]
 dependencies = [
-  "Django==5.0.8",
+  "Django==5.1",
   "django-agnocomplete==2.2.0",
   "django-environ==0.11.2",
   "django-probes==1.7.0",
diff --git a/umap/storage.py b/umap/storage.py
index 1ca63a86..94295661 100644
--- a/umap/storage.py
+++ b/umap/storage.py
@@ -8,6 +8,7 @@ from rjsmin import jsmin
 
 class UmapManifestStaticFilesStorage(ManifestStaticFilesStorage):
     support_js_module_import_aggregation = True
+    max_post_process_passes = 15
 
     # We remove `;` at the end of all regexps to match our biome config.
     _js_module_import_aggregation_patterns = (
diff --git a/umap/tests/integration/test_statics.py b/umap/tests/integration/test_statics.py
deleted file mode 100644
index 4df25705..00000000
--- a/umap/tests/integration/test_statics.py
+++ /dev/null
@@ -1,47 +0,0 @@
-import re
-import shutil
-import tempfile
-from copy import deepcopy
-
-import pytest
-from django.core.management import call_command
-from django.utils.translation import override
-from playwright.sync_api import expect
-
-
-@pytest.fixture
-def staticfiles(settings):
-    static_root = tempfile.mkdtemp(prefix="test_static")
-    settings.STATIC_ROOT = static_root
-    # Make sure settings are properly reset after the test
-    settings.STORAGES = deepcopy(settings.STORAGES)
-    settings.STORAGES["staticfiles"]["BACKEND"] = (
-        "umap.storage.UmapManifestStaticFilesStorage"
-    )
-    try:
-        call_command("collectstatic", "--noinput")
-        yield
-    finally:
-        shutil.rmtree(static_root)
-
-
-def test_javascript_have_been_loaded(
-    map, live_server, datalayer, page, settings, staticfiles
-):
-    datalayer.settings["displayOnLoad"] = False
-    datalayer.save()
-    map.settings["properties"]["defaultView"] = "latest"
-    map.save()
-    with override("fr"):
-        url = f"{live_server.url}{map.get_absolute_url()}"
-        assert "/fr/" in url
-        page.goto(url)
-    # Hash is defined, so map is initialized
-    expect(page).to_have_url(re.compile(r".*#7/48\..+/13\..+"))
-    expect(page).to_have_url(re.compile(r".*/fr/"))
-    # Should be in French, so hashed locale file has been loaded correctly
-    button = page.get_by_role("button", name="Explorateur")
-    expect(button).to_be_visible()
-    button.click()
-    layers = page.locator(".umap-browser .datalayer")
-    expect(layers).to_have_count(1)
diff --git a/umap/tests/test_statics.py b/umap/tests/test_statics.py
new file mode 100644
index 00000000..c29b57d7
--- /dev/null
+++ b/umap/tests/test_statics.py
@@ -0,0 +1,40 @@
+import json
+import shutil
+import tempfile
+from copy import deepcopy
+from pathlib import Path
+
+import pytest
+from django.core.management import call_command
+
+
+@pytest.fixture
+def staticfiles(settings):
+    static_root = tempfile.mkdtemp(prefix="test_static")
+    settings.STATIC_ROOT = static_root
+    # Make sure settings are properly reset after the test
+    settings.STORAGES = deepcopy(settings.STORAGES)
+    settings.STORAGES["staticfiles"]["BACKEND"] = (
+        "umap.storage.UmapManifestStaticFilesStorage"
+    )
+    try:
+        call_command("collectstatic", "--noinput")
+        yield
+    finally:
+        shutil.rmtree(static_root)
+
+
+def test_collectstatic_ran_successfully_with_hashes(settings, staticfiles):
+    static_root = settings.STATIC_ROOT
+    manifest = Path(static_root) / "staticfiles.json"
+    assert manifest.exists()
+    json_manifest = json.loads(manifest.read_text())
+    assert "hash" in json_manifest.keys()
+    assert "umap/base.css" in json_manifest["paths"]
+    # Hash + the dot ("umap/base.<hash>.css").
+    md5_hash_lenght = 12 + 1
+    # The value of the manifest must contain the hash (length).
+    assert (
+        len(json_manifest["paths"]["umap/base.css"])
+        == len("umap/base.css") + md5_hash_lenght
+    )