2 files changed, 11 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index 827d108fd7..979216bee7 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -880,6 +880,8 @@ module ActiveRecord
           raise "unscope(where: #{target_value.inspect}) failed: unscoping #{rel.class} is unimplemented."
         end
       end
+
+      bind_values.reject! { |col,_| col.name == target_value }
     end
 
     def custom_join_ast(table, joins)
diff --git a/activerecord/test/cases/relations_test.rb b/activerecord/test/cases/relations_test.rb
index 031da8e6d6..a0896f7f8d 100644
--- a/activerecord/test/cases/relations_test.rb
+++ b/activerecord/test/cases/relations_test.rb
@@ -1524,6 +1524,15 @@ class RelationTest < ActiveRecord::TestCase
     assert merged.to_sql.include?("bbq")
   end
 
+  def test_unscope_removes_binds
+    left  = Post.where(id: Arel::Nodes::BindParam.new('?'))
+    column = Post.columns_hash['id']
+    left.bind_values += [[column, 20]]
+
+    relation = left.unscope(where: :id)
+    assert_equal [], relation.bind_values
+  end
+
   def test_merging_removes_rhs_bind_parameters
     left  = Post.where(id: Arel::Nodes::BindParam.new('?'))
     column = Post.columns_hash['id']