diff --git a/camelot/parsers/lattice.py b/camelot/parsers/lattice.py
index ca3731d..f4bc2c0 100644
--- a/camelot/parsers/lattice.py
+++ b/camelot/parsers/lattice.py
@@ -357,8 +357,8 @@ class Lattice(BaseParser):
 
         if not self.horizontal_text:
             if self.images:
-                warnings.warn('The page is image-based, Camelot only works with'
-                              ' text-based PDF pages.'.format(os.path.basename(self.rootname)))
+                warnings.warn('{} is image-based, camelot only works on'
+                              ' text-based pages.'.format(os.path.basename(self.rootname)))
             else:
                 warnings.warn('No tables found on {}'.format(
                     os.path.basename(self.rootname)))
diff --git a/camelot/parsers/stream.py b/camelot/parsers/stream.py
index 83e2598..d36212b 100644
--- a/camelot/parsers/stream.py
+++ b/camelot/parsers/stream.py
@@ -396,8 +396,8 @@ class Stream(BaseParser):
 
         if not self.horizontal_text:
             if self.images:
-                warnings.warn('The page is image-based, Camelot only works with'
-                              ' text-based PDF pages.'.format(os.path.basename(self.rootname)))
+                warnings.warn('{} is image-based, camelot only works on'
+                              ' text-based pages.'.format(os.path.basename(self.rootname)))
             else:
                 warnings.warn('No tables found on {}'.format(
                     os.path.basename(self.rootname)))
diff --git a/tests/files/image.pdf b/tests/files/image.pdf
new file mode 100644
index 0000000..83f5969
Binary files /dev/null and b/tests/files/image.pdf differ
diff --git a/tests/test_errors.py b/tests/test_errors.py
index e0dc24a..a4b38ec 100755
--- a/tests/test_errors.py
+++ b/tests/test_errors.py
@@ -41,6 +41,15 @@ def test_stream_equal_length():
             table_areas=['10,20,30,40'], columns=['10,20,30,40', '10,20,30,40'])
 
 
+def test_image_warning():
+    filename = os.path.join(testdir, 'image.pdf')
+    with warnings.catch_warnings():
+        warnings.simplefilter('error')
+        with pytest.raises(UserWarning) as e:
+            tables = camelot.read_pdf(filename)
+        assert str(e.value) == 'page-1 is image-based, camelot only works on text-based pages.'
+
+
 def test_no_tables_found():
     filename = os.path.join(testdir, 'blank.pdf')
     with warnings.catch_warnings():