diff --git a/IPython/core/tests/test_inputtransformer2_line.py b/IPython/core/tests/test_inputtransformer2_line.py
index f93c68f..8643a46 100644
--- a/IPython/core/tests/test_inputtransformer2_line.py
+++ b/IPython/core/tests/test_inputtransformer2_line.py
@@ -62,36 +62,48 @@ for a in range(5):
 """)
 
 
-IPYTHON_PROMPT_VI_INS = ("""\
+IPYTHON_PROMPT_VI_INS = (
+    """\
 [ins] In [11]: def a():
           ...:     123
           ...:
           ...: 123
-""", """\
+""",
+    """\
 def a():
     123
 
 123
-""")
+""",
+)
 
-IPYTHON_PROMPT_VI_NAV = ("""\
+IPYTHON_PROMPT_VI_NAV = (
+    """\
 [nav] In [11]: def a():
           ...:     123
           ...:
           ...: 123
-""", """\
+""",
+    """\
 def a():
     123
 
 123
-""")
+""",
+)
 
 
 def test_ipython_prompt():
-    for sample, expected in [IPYTHON_PROMPT, IPYTHON_PROMPT_L2,
-                             IPYTHON_PROMPT_VI_INS, IPYTHON_PROMPT_VI_NAV]:
-        nt.assert_equal(ipt2.ipython_prompt(sample.splitlines(keepends=True)),
-                        expected.splitlines(keepends=True))
+    for sample, expected in [
+        IPYTHON_PROMPT,
+        IPYTHON_PROMPT_L2,
+        IPYTHON_PROMPT_VI_INS,
+        IPYTHON_PROMPT_VI_NAV,
+    ]:
+        nt.assert_equal(
+            ipt2.ipython_prompt(sample.splitlines(keepends=True)),
+            expected.splitlines(keepends=True),
+        )
 
 
 INDENT_SPACES = ("""\