We have pytest and pluggy in vendor-packages.

--- coverage-7.6.7/tests/test_cmdline.py.orig
+++ coverage-7.6.7/tests/test_cmdline.py
@@ -348,8 +348,8 @@
         s = re.escape(os.sep)
         assert lines[0].startswith("-- premain ----")
         assert len(lines) > 25
-        assert re.search(fr"{s}site-packages{s}_pytest{s}", out)
-        assert re.search(fr"{s}site-packages{s}pluggy{s}", out)
+        assert re.search(fr"{s}vendor-packages{s}_pytest{s}", out)
+        assert re.search(fr"{s}vendor-packages{s}pluggy{s}", out)
         assert re.search(fr"(?m)^\s+test_debug_premain : .*{s}tests{s}test_cmdline.py:\d+$", out)
         assert re.search(fr"(?m)^\s+command_line : .*{s}coverage{s}cmdline.py:\d+$", out)
         assert re.search(fr"(?m)^\s+do_debug : .*{s}coverage{s}cmdline.py:\d+$", out)
--- coverage-7.6.7/tests/test_debug.py.orig
+++ coverage-7.6.7/tests/test_debug.py
@@ -378,8 +378,8 @@
             py = "pypy" if env.PYPY else "python"
             majv, minv = sys.version_info[:2]
             pylib = f"lib{s}{py}{majv}.{minv}{sys.abiflags}"
-        assert len(re_lines(fr"{s}{pylib}{s}site-packages{s}_pytest", stack_text)) > 3
-        assert len(re_lines(fr"{s}{pylib}{s}site-packages{s}pluggy", stack_text)) > 3
+        assert len(re_lines(fr"{s}{pylib}{s}vendor-packages{s}_pytest", stack_text)) > 3
+        assert len(re_lines(fr"{s}{pylib}{s}vendor-packages{s}pluggy", stack_text)) > 3
         assert not re_lines(r" 0x[0-9a-fA-F]+", stack_text) # No frame ids
         stack = stack_text.splitlines()
         assert len(stack) > 25
@@ -391,7 +391,7 @@
     def test_short_stack_short_filenames(self) -> None:
         stack_text = f_one(full=True, short_filenames=True)
         s = re.escape(os.sep)
-        assert not re_lines(r"site-packages", stack_text)
+        assert not re_lines(r"vendor-packages", stack_text)
         assert len(re_lines(fr"syspath:{s}_pytest", stack_text)) > 3
         assert len(re_lines(fr"syspath:{s}pluggy", stack_text)) > 3
 
--- coverage-7.6.7/coverage/debug.py.orig
+++ coverage-7.6.7/coverage/debug.py
@@ -230,7 +230,7 @@
     functions can call this and not be included in the result.
 
     If `full` is true, then include all frames.  Otherwise, initial "boring"
-    frames (ones in site-packages and earlier) are omitted.
+    frames (ones in vendor-packages and earlier) are omitted.
 
     `short_filenames` will shorten filenames using `short_filename`, to reduce
     the amount of repetitive noise in stack traces.
@@ -240,7 +240,7 @@
     BORING_PRELUDE = [
         "<string>",             # pytest-xdist has string execution.
         r"\bigor.py$",          # Our test runner.
-        r"\bsite-packages\b",   # pytest etc getting to our tests.
+        r"\bvendor-packages\b", # pytest etc getting to our tests.
     ]
 
     stack: Iterable[inspect.FrameInfo] = inspect.stack()[:skip:-1]