diff --git a/trio/_core/tests/test_multierror.py b/trio/_core/tests/test_multierror.py
index 327df8e2b6..39581e1ac6 100644
--- a/trio/_core/tests/test_multierror.py
+++ b/trio/_core/tests/test_multierror.py
@@ -593,10 +593,16 @@ def test_custom_excepthook():
     have_ipython = True
 
 need_ipython = pytest.mark.skipif(not have_ipython, reason="need IPython")
+# https://github.com/ipython/ipython/issues/11590
+fails_on_38 = pytest.mark.xfail(
+    sys.version_info >= (3, 8),
+    reason="IPython is currently broken on 3.8-dev"
+)
 
 
 @slow
 @need_ipython
+@fails_on_38
 def test_ipython_exc_handler():
     completed = run_script("simple_excepthook.py", use_ipython=True)
     check_simple_excepthook(completed)
@@ -611,6 +617,7 @@ def test_ipython_imported_but_unused():
 
 @slow
 @need_ipython
+@fails_on_38
 def test_ipython_custom_exc_handler():
     # Check we get a nice warning (but only one!) if the user is using IPython
     # and already has some other set_custom_exc handler installed.