diff --git a/newsfragments/3547.bugfix.rst b/newsfragments/3547.bugfix.rst
new file mode 100644
index 0000000000..d3ddc694e0
--- /dev/null
+++ b/newsfragments/3547.bugfix.rst
@@ -0,0 +1 @@
+`trio.Path.full_match` is now a synchronous method, like `pathlib.PurePath.full_match` and `trio.Path.match`. It was previously wrapped to run in a worker thread, so calling it without ``await`` returned a coroutine, which is always truthy.
diff --git a/src/trio/_path.py b/src/trio/_path.py
index ea571c9c01..d21dd51e1a 100644
--- a/src/trio/_path.py
+++ b/src/trio/_path.py
@@ -260,8 +260,6 @@ def __repr__(self) -> str:
     write_text = _wrap_method(pathlib.Path.write_text)
     if sys.version_info < (3, 12):
         link_to = _wrap_method(pathlib.Path.link_to)
-    if sys.version_info >= (3, 13):
-        full_match = _wrap_method(pathlib.Path.full_match)
 
     def as_uri(self) -> str:
         return self._wrapped_cls(self).as_uri()
diff --git a/src/trio/_tests/test_path.py b/src/trio/_tests/test_path.py
index 9fe3920df3..7b283a5624 100644
--- a/src/trio/_tests/test_path.py
+++ b/src/trio/_tests/test_path.py
@@ -2,6 +2,7 @@
 
 import os
 import pathlib
+import sys
 from typing import TYPE_CHECKING
 
 import pytest
@@ -230,6 +231,17 @@ async def test_globmethods(path: trio.Path) -> None:
     assert entries == {"_bar.txt", "bar.txt"}
 
 
+def test_full_match_is_sync() -> None:
+    if sys.version_info < (3, 13):
+        pytest.skip("PurePath.full_match is 3.13+")
+
+    # full_match() is a pure path method like match(), so it must not be async
+    path = trio.Path("foo/bar.py")
+    assert path.full_match("**/*.py") is True
+    assert path.full_match("*.py") is False
+    assert path.full_match("FOO/BAR.PY", case_sensitive=False) is True
+
+
 async def test_as_uri(path: trio.Path) -> None:
     path = await path.parent.resolve()