diff --git a/comicapi/utils.py b/comicapi/utils.py
index a135d78..6a1bb89 100644
--- a/comicapi/utils.py
+++ b/comicapi/utils.py
@@ -21,6 +21,7 @@ import pathlib
 import re
 import unicodedata
 from collections import defaultdict
+from shutil import which  # noqa: F401
 from typing import Any, Mapping
 
 import pycountry
@@ -77,25 +78,6 @@ def add_to_path(dirname: str) -> None:
             os.environ["PATH"] = dirname + os.pathsep + os.environ["PATH"]
 
 
-def which(program: str) -> str | None:
-    """Returns path of the executable, if it exists"""
-
-    def is_exe(fpath: str) -> bool:
-        return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
-
-    fpath, _ = os.path.split(program)
-    if fpath:
-        if is_exe(program):
-            return program
-    else:
-        for path in os.environ["PATH"].split(os.pathsep):
-            exe_file = os.path.join(path, program)
-            if is_exe(exe_file):
-                return exe_file
-
-    return None
-
-
 def xlate(data: Any, is_int: bool = False) -> Any:
     if data is None or data == "":
         return None
diff --git a/tests/comicarchive_test.py b/tests/comicarchive_test.py
index 1161282..9bb9b06 100644
--- a/tests/comicarchive_test.py
+++ b/tests/comicarchive_test.py
@@ -89,7 +89,7 @@ archivers = [
     comicapi.comicarchive.FolderArchiver,
     pytest.param(
         comicapi.comicarchive.RarArchiver,
-        marks=pytest.mark.xfail(not comicapi.comicarchive.rar_support, reason="rar support"),
+        marks=pytest.mark.xfail(not (comicapi.comicarchive.rar_support and shutil.which("rar")), reason="rar support"),
     ),
 ]