diff --git a/internal/configuration/validator/const.go b/internal/configuration/validator/const.go
index 34d3286fd..8656ca0fd 100644
--- a/internal/configuration/validator/const.go
+++ b/internal/configuration/validator/const.go
@@ -116,7 +116,7 @@ const (
 // Storage Error constants.
 const (
 	errStrStorage                            = "storage: configuration for a 'local', 'mysql' or 'postgres' database must be provided"
-	errStrStorageEncryptionKeyMustBeProvided = "storage: option 'encryption_key' must is required"
+	errStrStorageEncryptionKeyMustBeProvided = "storage: option 'encryption_key' is required"
 	errStrStorageEncryptionKeyTooShort       = "storage: option 'encryption_key' must be 20 characters or longer"
 	errFmtStorageUserPassMustBeProvided      = "storage: %s: option 'username' and 'password' are required" //nolint:gosec
 	errFmtStorageOptionMustBeProvided        = "storage: %s: option '%s' is required"
diff --git a/internal/configuration/validator/storage_test.go b/internal/configuration/validator/storage_test.go
index 2d1cd8e50..b892c60fb 100644
--- a/internal/configuration/validator/storage_test.go
+++ b/internal/configuration/validator/storage_test.go
@@ -196,7 +196,7 @@ func (suite *StorageSuite) TestShouldRaiseErrorOnNoEncryptionKey() {
 
 	suite.Require().Len(suite.validator.Warnings(), 0)
 	suite.Require().Len(suite.validator.Errors(), 1)
-	suite.Assert().EqualError(suite.validator.Errors()[0], "storage: option 'encryption_key' must is required")
+	suite.Assert().EqualError(suite.validator.Errors()[0], "storage: option 'encryption_key' is required")
 }
 
 func (suite *StorageSuite) TestShouldRaiseErrorOnShortEncryptionKey() {
diff --git a/internal/suites/suite_cli_test.go b/internal/suites/suite_cli_test.go
index b236e1dd9..0fd51c2cc 100644
--- a/internal/suites/suite_cli_test.go
+++ b/internal/suites/suite_cli_test.go
@@ -622,12 +622,12 @@ func (s *CLISuite) TestStorageShouldShowErrWithoutConfig() {
 	output, err := s.Exec("authelia-backend", []string{"authelia", s.testArg, s.coverageArg, "storage", "schema-info"})
 	s.Assert().EqualError(err, "exit status 1")
 
-	s.Assert().Contains(output, "Error: storage: configuration for a 'local', 'mysql' or 'postgres' database must be provided, storage: option 'encryption_key' must is required\n")
+	s.Assert().Contains(output, "Error: storage: configuration for a 'local', 'mysql' or 'postgres' database must be provided, storage: option 'encryption_key' is required\n")
 
 	output, err = s.Exec("authelia-backend", []string{"authelia", s.testArg, s.coverageArg, "storage", "migrate", "history"})
 	s.Assert().EqualError(err, "exit status 1")
 
-	s.Assert().Contains(output, "Error: storage: configuration for a 'local', 'mysql' or 'postgres' database must be provided, storage: option 'encryption_key' must is required\n")
+	s.Assert().Contains(output, "Error: storage: configuration for a 'local', 'mysql' or 'postgres' database must be provided, storage: option 'encryption_key' is required\n")
 }
 
 func (s *CLISuite) TestStorage00ShouldShowCorrectPreInitInformation() {