1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/test/cases/adapters/postgresql/numbers_test.rb b/activerecord/test/cases/adapters/postgresql/numbers_test.rb
index e5f1828065..bfb2b7c27a 100644
--- a/activerecord/test/cases/adapters/postgresql/numbers_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/numbers_test.rb
@@ -31,7 +31,7 @@ class PostgresqlNumberTest < ActiveRecord::PostgreSQLTestCase
     assert_equal 123456.789, first.double
     assert_equal(-::Float::INFINITY, second.single)
     assert_equal ::Float::INFINITY, second.double
-    assert third.double.nan?
+    assert third.double.nan?, "Expected #{third.double} to be NaN"
   end
 
   def test_update