diff --git a/changelog/4028.trivial.rst b/changelog/4028.trivial.rst
new file mode 100644
index 000000000..2ec5f6306
--- /dev/null
+++ b/changelog/4028.trivial.rst
@@ -0,0 +1 @@
+Revert patching of ``sys.breakpointhook`` since it appears to do nothing.
diff --git a/src/_pytest/debugging.py b/src/_pytest/debugging.py
index cc9bf5c2a..e717e23b3 100644
--- a/src/_pytest/debugging.py
+++ b/src/_pytest/debugging.py
@@ -9,13 +9,6 @@ from doctest import UnexpectedException
 from _pytest import outcomes
 from _pytest.config import hookimpl
 
-try:
-    from builtins import breakpoint  # noqa
-
-    SUPPORTS_BREAKPOINT_BUILTIN = True
-except ImportError:
-    SUPPORTS_BREAKPOINT_BUILTIN = False
-
 
 def pytest_addoption(parser):
     group = parser.getgroup("general")
@@ -53,20 +46,12 @@ def pytest_configure(config):
     if config.getvalue("usepdb"):
         config.pluginmanager.register(PdbInvoke(), "pdbinvoke")
 
-    # Use custom Pdb class set_trace instead of default Pdb on breakpoint() call
-    if SUPPORTS_BREAKPOINT_BUILTIN:
-        _environ_pythonbreakpoint = os.environ.get("PYTHONBREAKPOINT", "")
-        if _environ_pythonbreakpoint == "":
-            sys.breakpointhook = pytestPDB.set_trace
-
     old = (pdb.set_trace, pytestPDB._pluginmanager)
 
     def fin():
         pdb.set_trace, pytestPDB._pluginmanager = old
         pytestPDB._config = None
         pytestPDB._pdb_cls = pdb.Pdb
-        if SUPPORTS_BREAKPOINT_BUILTIN:
-            sys.breakpointhook = sys.__breakpointhook__
 
     pdb.set_trace = pytestPDB.set_trace
     pytestPDB._pluginmanager = config.pluginmanager
diff --git a/testing/test_pdb.py b/testing/test_pdb.py
index 57a6cb9a3..0cda739a4 100644
--- a/testing/test_pdb.py
+++ b/testing/test_pdb.py
@@ -4,9 +4,15 @@ import platform
 import os
 
 import _pytest._code
-from _pytest.debugging import SUPPORTS_BREAKPOINT_BUILTIN
 import pytest
 
+try:
+    breakpoint
+except NameError:
+    SUPPORTS_BREAKPOINT_BUILTIN = False
+else:
+    SUPPORTS_BREAKPOINT_BUILTIN = True
+
 
 _ENVIRON_PYTHONBREAKPOINT = os.environ.get("PYTHONBREAKPOINT", "")