diff --git a/erpnext/regional/germany/accounts_controller.py b/erpnext/regional/germany/accounts_controller.py
index 5b2b31f2043..7f76493608e 100644
--- a/erpnext/regional/germany/accounts_controller.py
+++ b/erpnext/regional/germany/accounts_controller.py
@@ -48,9 +48,6 @@ def validate_regional(doc):
 
 def missing(field_label, regulation):
 	"""Notify the user that a required field is missing."""
-	context = 'Specific for Germany. Example: Remember to set Company Tax ID. It is required by § 14 Abs. 4 Nr. 2 UStG.'
-	msgprint(_('Remember to set {field_label}. It is required by {regulation}.', context=context).format(
-			field_label=frappe.bold(_(field_label)),
-			regulation=regulation
-		)
-	)
+	translated_msg = _('Remember to set {field_label}. It is required by {regulation}.', context='Specific for Germany. Example: Remember to set Company Tax ID. It is required by § 14 Abs. 4 Nr. 2 UStG.') # noqa: E501
+	formatted_msg = translated_msg.format(field_label=frappe.bold(_(field_label)), regulation=regulation)
+	msgprint(formatted_msg)
diff --git a/erpnext/regional/germany/test_accounts_controller.py b/erpnext/regional/germany/test_accounts_controller.py
new file mode 100644
index 00000000000..8bd378c971f
--- /dev/null
+++ b/erpnext/regional/germany/test_accounts_controller.py
@@ -0,0 +1,12 @@
+import frappe
+import unittest
+from erpnext.regional.germany.accounts_controller import validate_regional
+
+
+class TestAccountsController(unittest.TestCase):
+
+	def setUp(self):
+		self.sales_invoice = frappe.get_last_doc('Sales Invoice')
+
+	def test_validate_regional(self):
+		validate_regional(self.sales_invoice)