diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index 4ceda388a2..8a60a695cf 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,3 +1,7 @@
+*   Remove deprecated `ActiveRecord::ConnectionAdapters::AbstractAdapter#supports_multi_insert?`.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated `ActiveRecord::ConnectionAdapters::AbstractAdapter#supports_foreign_keys_in_create?`.
 
     *Rafael Mendonça França*
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
index 270cd285b6..1cec16ea30 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
@@ -370,12 +370,6 @@ def supports_comments_in_create?
         false
       end
 
-      # Does this adapter support multi-value insert?
-      def supports_multi_insert?
-        true
-      end
-      deprecate :supports_multi_insert?
-
       # Does this adapter support virtual columns?
       def supports_virtual_columns?
         false
diff --git a/activerecord/test/cases/adapter_test.rb b/activerecord/test/cases/adapter_test.rb
index 17cc6de74c..9b86521d4f 100644
--- a/activerecord/test/cases/adapter_test.rb
+++ b/activerecord/test/cases/adapter_test.rb
@@ -332,10 +332,6 @@ def test_select_methods_passing_a_relation
       assert_equal "special_db_type", @connection.type_to_sql(:special_db_type)
     end
 
-    def test_supports_multi_insert_is_deprecated
-      assert_deprecated { @connection.supports_multi_insert? }
-    end
-
     def test_column_name_length_is_deprecated
       assert_deprecated { @connection.column_name_length }
     end
diff --git a/guides/source/6_1_release_notes.md b/guides/source/6_1_release_notes.md
index e7b1473b33..dd7b55446f 100644
--- a/guides/source/6_1_release_notes.md
+++ b/guides/source/6_1_release_notes.md
@@ -149,6 +149,8 @@ Please refer to the [Changelog][active-record] for detailed changes.
 
 ### Removals
 
+*   Remove deprecated `ActiveRecord::ConnectionAdapters::AbstractAdapter#supports_multi_insert?`.
+
 *   Remove deprecated `ActiveRecord::ConnectionAdapters::AbstractAdapter#supports_foreign_keys_in_create?`.
 
 *   Remove deprecated `ActiveRecord::ConnectionAdapters::PostgreSQLAdapter#supports_ranges?`.