Fixed #32073 -- Skipped collation tests on PostgreSQL < 10.

PostgreSQL < 10 doesn't support ICU collations.

Thanks Hannes Ljungberg for the report.

1 files changed, 10 insertions, 4 deletions

diff --git a/django/db/backends/postgresql/features.py b/django/db/backends/postgresql/features.py
index e70ef4e95d..7615c2b4c3 100644
--- a/django/db/backends/postgresql/features.py
+++ b/django/db/backends/postgresql/features.py
@@ -58,10 +58,16 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     supports_deferrable_unique_constraints = True
     has_json_operators = True
     json_key_contains_list_matching_requires_list = True
-    test_collations = {
-        'non_default': 'sv-x-icu',
-        'swedish_ci': 'sv-x-icu',
-    }
+
+    @cached_property
+    def test_collations(self):
+        # PostgreSQL < 10 doesn't support ICU collations.
+        if self.is_postgresql_10:
+            return {
+                'non_default': 'sv-x-icu',
+                'swedish_ci': 'sv-x-icu',
+            }
+        return {}
 
     @cached_property
     def introspected_field_types(self):