diff --git a/src/serena/symbol.py b/src/serena/symbol.py
index 6aa76fb..70b650a 100644
--- a/src/serena/symbol.py
+++ b/src/serena/symbol.py
@@ -498,7 +498,7 @@ class Symbol(AbstractSymbol, ToStringMixin):
         depth: int = 0,
         include_body: bool = False,
         include_children_body: bool = False,
-        include_relative_path=True,
+        include_relative_path: bool = True,
     ) -> dict[str, Any]:
         """
         Converts the symbol to a dictionary.
diff --git a/src/serena/util/exception.py b/src/serena/util/exception.py
index 8ab2f00..f9cbb56 100644
--- a/src/serena/util/exception.py
+++ b/src/serena/util/exception.py
@@ -19,7 +19,7 @@ def is_headless_environment() -> bool:
         return False
 
     # Check for DISPLAY variable (required for X11)
-    if not os.environ.get("DISPLAY"):
+    if not os.environ.get("DISPLAY"):  # type: ignore
         return True
 
     # Check for SSH session