diff --git a/spec/support/matchers/has_errors_on.rb b/spec/support/matchers/has_errors_on.rb
new file mode 100644
index 0000000..fc00050
--- /dev/null
+++ b/spec/support/matchers/has_errors_on.rb
@@ -0,0 +1,6 @@
+RSpec::Matchers.define :have_error_on do |expected|
+  match do |actual|
+    expect(actual).to_not be_valid
+    expect(actual.errors.keys).to include expected
+  end
+end