diff --git a/odoo/service/server.py b/odoo/service/server.py
index 6c3d5784794..91506818cfe 100644
--- a/odoo/service/server.py
+++ b/odoo/service/server.py
@@ -1308,7 +1308,7 @@ def preload_registries(dbnames):
                 _logger.info("Starting post tests")
                 tests_before = registry._assertion_report.testsRun
                 post_install_suite = loader.make_suite(module_names, 'post_install')
-                if post_install_suite.countTestCases():
+                if post_install_suite.has_http_case():
                     with registry.cursor() as cr:
                         env = odoo.api.Environment(cr, odoo.SUPERUSER_ID, {})
                         env['ir.qweb']._pregenerate_assets_bundles()
diff --git a/odoo/tests/common.py b/odoo/tests/common.py
index 13bc150754d..c7eb7268770 100644
--- a/odoo/tests/common.py
+++ b/odoo/tests/common.py
@@ -320,6 +320,9 @@ class OdooSuite(BackportSuite):
         with result.collectStats(test_id):
             super()._tearDownPreviousClass(test, result)
 
+    def has_http_case(self):
+        return self.countTestCases() and any(isinstance(test_case, HttpCase) for test_case in self)
+
 
 class MetaCase(type):
     """ Metaclass of test case classes to assign default 'test_tags':