diff --git a/codechecker_common/skiplist_handler.py b/codechecker_common/skiplist_handler.py
index 89ff34b884..2b120e270b 100644
--- a/codechecker_common/skiplist_handler.py
+++ b/codechecker_common/skiplist_handler.py
@@ -103,12 +103,6 @@ def should_skip(self, source):
                 return sign == '-'
         return False
 
-    def __call__(self, source_file_path: str) -> bool:
-        """
-        Check if the given source should be skipped.
-        """
-        return self.should_skip(source_file_path)
-
 class SkipListHandlers(list):
     def should_skip(self, file_path: str):
         """
@@ -116,11 +110,3 @@ def should_skip(self, file_path: str):
         handler.
         """
         return any(handler.should_skip(file_path) for handler in self)
-
-    # FIXME: eliminate this function and use should_skip instead of this.
-    # Do the same in the SkipListHandler class above.
-    def __call__(self, file_path: str) -> bool:
-        """
-        Check if the given source should be skipped.
-        """
-        return self.should_skip(file_path)
diff --git a/tools/report-converter/codechecker_report_converter/report/__init__.py b/tools/report-converter/codechecker_report_converter/report/__init__.py
index fc3512577b..cadea68fbc 100644
--- a/tools/report-converter/codechecker_report_converter/report/__init__.py
+++ b/tools/report-converter/codechecker_report_converter/report/__init__.py
@@ -14,7 +14,7 @@
 import logging
 import os
 
-from typing import Callable, Dict, List, Optional, Set
+from typing import Callable, Dict, List, Optional, Protocol, Set
 
 from .. import util
 
@@ -22,7 +22,8 @@
 LOG = logging.getLogger('report-converter')
 
 
-SkipListHandlers = Callable[[str], bool]
+class SkipListHandlers(Protocol):
+    should_skip: Callable[[str], bool]
 
 
 InvalidFileContentMsg: str = \
@@ -473,7 +474,7 @@ def skip(self, skip_handlers: Optional[SkipListHandlers]) -> bool:
         if not skip_handlers:
             return False
 
-        return skip_handlers(self.file.original_path)
+        return skip_handlers.should_skip(self.file.original_path)
 
     def to_json(self) -> Dict:
         """ Creates a JSON dictionary. """