diff --git a/dungeonsheets/readers.py b/dungeonsheets/readers.py
index c01f03a..927ab5f 100644
--- a/dungeonsheets/readers.py
+++ b/dungeonsheets/readers.py
@@ -47,7 +47,7 @@ def read_sheet_file(filename: Union[str, Path]) -> dict:
     char_props = {}
     parent_sheets = these_props.pop('parent_sheets', [])
     for parent_sheet in parent_sheets:
-        parent_sheet = Path(parent_sheet)
+        parent_sheet = (filename.parent / parent_sheet).resolve()
         if parent_sheet != filename:
             parent_props = read_sheet_file(parent_sheet)
             char_props.update(parent_props)
diff --git a/tests/test_make_sheets.py b/tests/test_make_sheets.py
index 424eac6..70330ed 100644
--- a/tests/test_make_sheets.py
+++ b/tests/test_make_sheets.py
@@ -7,7 +7,7 @@ from dungeonsheets import make_sheets, character, monsters
 
 EG_DIR = Path(__file__).parent.parent.resolve() / "examples"
 CHARFILE = EG_DIR / "rogue1.py"
-GMFILE = EG_DIR / "gm.py"
+GMFILE = EG_DIR / "gm-session-notes.py"
 
 
 class MakeSheetsTestCase(unittest.TestCase):
diff --git a/tests/test_readers.py b/tests/test_readers.py
index d1ac3bf..aa91c33 100644
--- a/tests/test_readers.py
+++ b/tests/test_readers.py
@@ -9,7 +9,7 @@ from dungeonsheets.readers import read_sheet_file
 
 EG_DIR = (Path(__file__).parent.parent / "examples").resolve()
 CHAR_PYTHON_FILE = EG_DIR / "rogue1.py"
-GM_PYTHON_FILE = EG_DIR / "gm.py"
+GM_PYTHON_FILE = EG_DIR / "gm-session-notes.py"
 ROLL20_JSON_FILE = EG_DIR / "barbarian3.json"
 FOUNDRY_JSON_FILE = EG_DIR / "bard3_foundry.json"
 SPELLCASTER_JSON_FILE = EG_DIR / "artificer2.json"