diff --git a/IPython/terminal/pt_inputhooks/__init__.py b/IPython/terminal/pt_inputhooks/__init__.py
index ff13ee4..146424c 100644
--- a/IPython/terminal/pt_inputhooks/__init__.py
+++ b/IPython/terminal/pt_inputhooks/__init__.py
@@ -59,21 +59,21 @@ def set_qt_api(gui):
     loaded = loaded_api()
 
     qt_env2gui = {
-        QT_API_PYSIDE: 'qt4',
-        QT_API_PYQTv1: 'qt4',
-        QT_API_PYQT: 'qt4',
-        QT_API_PYSIDE2: 'qt5',
-        QT_API_PYQT5: 'qt5',
-        QT_API_PYSIDE6: 'qt6',
-        QT_API_PYQT6: 'qt6',
+        QT_API_PYSIDE: "qt4",
+        QT_API_PYQTv1: "qt4",
+        QT_API_PYQT: "qt4",
+        QT_API_PYSIDE2: "qt5",
+        QT_API_PYQT5: "qt5",
+        QT_API_PYSIDE6: "qt6",
+        QT_API_PYQT6: "qt6",
     }
-    if loaded is not None and gui != 'qt':
+    if loaded is not None and gui != "qt":
         if qt_env2gui[loaded] != gui:
             raise ImportError(
-                f'Cannot switch Qt versions for this session; must use {qt_env2gui[loaded]}.'
+                f"Cannot switch Qt versions for this session; must use {qt_env2gui[loaded]}."
             )
 
-    if qt_api is not None and gui != 'qt':
+    if qt_api is not None and gui != "qt":
         if qt_env2gui[qt_api] != gui:
             print(
                 f'Request for "{gui}" will be ignored because `QT_API` '
diff --git a/IPython/terminal/tests/test_pt_inputhooks.py b/IPython/terminal/tests/test_pt_inputhooks.py
index b9aa476..775d1c7 100644
--- a/IPython/terminal/tests/test_pt_inputhooks.py
+++ b/IPython/terminal/tests/test_pt_inputhooks.py
@@ -12,14 +12,14 @@ guis_avail = []
 def _get_qt_vers():
     """If any version of Qt is available, this will populate `guis_avail` with 'qt' and 'qtx'. Due
     to the import mechanism, we can't import multiple versions of Qt in one session."""
-    for gui in ['qt', 'qt6', 'qt5', 'qt4']:
-        print(f'Trying {gui}')
+    for gui in ["qt", "qt6", "qt5", "qt4"]:
+        print(f"Trying {gui}")
         try:
             set_qt_api(gui)
             importlib.import_module("IPython.terminal.pt_inputhooks.qt")
             guis_avail.append(gui)
-            if 'QT_API' in os.environ.keys():
-                del os.environ['QT_API']
+            if "QT_API" in os.environ.keys():
+                del os.environ["QT_API"]
         except ImportError:
             pass  # that version of Qt isn't available.
         except RuntimeError:
@@ -29,7 +29,9 @@ def _get_qt_vers():
 _get_qt_vers()
 
 
-@pytest.mark.skipif(len(guis_avail) == 0, reason='No viable version of PyQt or PySide installed.')
+@pytest.mark.skipif(
+    len(guis_avail) == 0, reason="No viable version of PyQt or PySide installed."
+)
 def test_inputhook_qt():
     gui = guis_avail[0]
 
@@ -37,7 +39,7 @@ def test_inputhook_qt():
     get_inputhook_name_and_func(gui)
 
     # ...and now we're stuck with this version of Qt for good; can't switch.
-    for not_gui in ['qt6', 'qt5', 'qt4']:
+    for not_gui in ["qt6", "qt5", "qt4"]:
         if not_gui not in guis_avail:
             break
 
@@ -45,4 +47,4 @@ def test_inputhook_qt():
         get_inputhook_name_and_func(not_gui)
 
     # A gui of 'qt' means "best available", or in this case, the last one that was used.
-    get_inputhook_name_and_func('qt')
+    get_inputhook_name_and_func("qt")