diff --git a/camelot/handlers.py b/camelot/handlers.py
index 8439c69..5896497 100644
--- a/camelot/handlers.py
+++ b/camelot/handlers.py
@@ -208,8 +208,6 @@ class PDFHandler():
             if not suppress_stdout:
                 logger.info(
                     "Processing {rootname}".format(rootname=rootname))
-            t = parser.extract_tables(
-                source_file
-            )
+            t = parser.extract_tables()
             tables.extend(t)
         return TableList(sorted(tables))
diff --git a/camelot/parsers/hybrid.py b/camelot/parsers/hybrid.py
index 9d12350..f240ce4 100644
--- a/camelot/parsers/hybrid.py
+++ b/camelot/parsers/hybrid.py
@@ -420,7 +420,7 @@ class Hybrid(BaseParser):
 
         return table
 
-    def extract_tables(self, filename):
+    def extract_tables(self):
         if self._document_has_no_text():
             return []
 
diff --git a/camelot/parsers/lattice.py b/camelot/parsers/lattice.py
index b7cb02e..2e62846 100644
--- a/camelot/parsers/lattice.py
+++ b/camelot/parsers/lattice.py
@@ -303,7 +303,7 @@ class Lattice(BaseParser):
 
         return table
 
-    def extract_tables(self, filename):
+    def extract_tables(self):
         if self._document_has_no_text():
             return []
 
diff --git a/camelot/parsers/stream.py b/camelot/parsers/stream.py
index 087f5ce..536195e 100644
--- a/camelot/parsers/stream.py
+++ b/camelot/parsers/stream.py
@@ -418,7 +418,7 @@ class Stream(BaseParser):
 
         return table
 
-    def extract_tables(self, filename):
+    def extract_tables(self):
         if self._document_has_no_text():
             return []