diff --git a/src/pylorax/api/recipes.py b/src/pylorax/api/recipes.py
index c0ab55b4..a3f5fbde 100644
--- a/src/pylorax/api/recipes.py
+++ b/src/pylorax/api/recipes.py
@@ -1044,11 +1044,9 @@ def get_commit_details(commit, revision=None):
     datetime = sig.get_time()
     # XXX What do we do with timezone?
     _timezone = sig.get_time_zone()
-    timeval = GLib.TimeVal()
-    ok = datetime.to_timeval(timeval)
-    if not ok:
+    time_str = datetime.format_iso8601()
+    if not time_str:
         raise CommitTimeValError
-    time_str = timeval.to_iso8601()
 
     return CommitDetails(commit_str, time_str, message, revision)
 
diff --git a/tests/pylorax/test_recipes.py b/tests/pylorax/test_recipes.py
index 58b83b02..5c4a1e74 100644
--- a/tests/pylorax/test_recipes.py
+++ b/tests/pylorax/test_recipes.py
@@ -681,7 +681,7 @@ hostname = "testing-bad-recipe"
 
     def test_03_list_commits_commit_time_val_error(self):
         """Test listing recipe commits which raise CommitTimeValError"""
-        with mock.patch('pylorax.api.recipes.GLib.DateTime.to_timeval', return_value=False):
+        with mock.patch('pylorax.api.recipes.GLib.DateTime.format_iso8601', return_value=False):
             commits = recipes.list_commits(self.repo, "master", "test-recipe.toml")
         self.assertEqual(len(commits), 0, "Wrong number of commits.")