Fixed CI

Author: ankane

test/search_test.rb

@@ -9,12 +9,18 @@ def test_search_relation
   end
 
   def test_unscoped
-    error = assert_raises(Searchkick::Error) do
+    if mongoid?
       Product.unscoped do
         Product.search("*")
       end
+    else
+      error = assert_raises(Searchkick::Error) do
+        Product.unscoped do
+          Product.search("*")
+        end
+      end
+      assert_equal "search must be called on model, not relation", error.message
     end
-    assert_equal "search must be called on model, not relation", error.message
 
     Product.unscoped do
       Searchkick.search("*", models: [Product])