diff --git a/tests/test_errors.py b/tests/test_errors.py
index 595c54b..b94d800 100755
--- a/tests/test_errors.py
+++ b/tests/test_errors.py
@@ -2,12 +2,12 @@
 
 import os
 import warnings
+from camelot.utils import is_url
 
 import pytest
 
 import camelot
 
-
 testdir = os.path.dirname(os.path.abspath(__file__))
 testdir = os.path.join(testdir, "files")
 filename = os.path.join(testdir, "foo.pdf")
@@ -118,3 +118,7 @@ def test_bad_password():
     message = "file has not been decrypted"
     with pytest.raises(Exception, match=message):
         tables = camelot.read_pdf(filename, password="wrongpass")
+
+def test_invalid_url():
+    url = 'fttp://google.com/pdf'
+    assert is_url(url) == False
\ No newline at end of file