diff --git a/twoot.py b/twoot.py
index 570ee31..113b44f 100755
--- a/twoot.py
+++ b/twoot.py
@@ -1245,12 +1245,12 @@ def main(argv):
 
         except MastodonAPIError as e:
             _, _, _, exception_message = e.args
-            if 'Text character limit' in exception_message:
+            if in exception_message.find('Text character limit') != -1:
                 # ERROR (('Mastodon API returned error', 422, 'Unprocessable Entity', 'Validation failed: Text character limit of 500 exceeded'))
                 logging.error('Toot text too long: %s characters', str(len(tweet['tweet_text'])))
                 logging.error('posting ' + tweet['tweet_id'] + ' to ' + TOML['config']['mastodon_instance'] + ' Failed')
                 continue
-            elif 'Try again in a moment' in exception_message:
+            elif exception_message.find('Try again in a moment') != -1:
                 # ERROR ('Mastodon API returned error', 422, 'Unprocessable Entity', 'Cannot attach files that have not finished processing. Try again in a moment!')
                 logging.warning('Mastodon API Error 422: Cannot attach files that have not finished processing. Waiting 30 seconds and retrying.')
                 # Wait 30 seconds