diff --git a/IMPLEMENTATION_COVERAGE.md b/IMPLEMENTATION_COVERAGE.md
index 98a216c79..938cc3549 100644
--- a/IMPLEMENTATION_COVERAGE.md
+++ b/IMPLEMENTATION_COVERAGE.md
@@ -3645,11 +3645,11 @@
 - [ ] put_attributes
 - [ ] select
 
-## secretsmanager - 20% implemented
+## secretsmanager - 27% implemented
 - [ ] cancel_rotate_secret
 - [X] create_secret
 - [ ] delete_secret
-- [ ] describe_secret
+- [X] describe_secret
 - [X] get_random_password
 - [X] get_secret_value
 - [ ] list_secret_version_ids
diff --git a/moto/secretsmanager/models.py b/moto/secretsmanager/models.py
index 07b563633..c60feb530 100644
--- a/moto/secretsmanager/models.py
+++ b/moto/secretsmanager/models.py
@@ -47,7 +47,7 @@ class SecretsManagerBackend(BaseBackend):
 
     def get_secret_value(self, secret_id, version_id, version_stage):
 
-        if secret_id not in (self.secret_id, self.name):
+        if not self._is_valid_identifier(secret_id):
             raise ResourceNotFoundException()
 
         response = json.dumps({