Older versions render a little less pretty

IPython/core/tests/test_oinspect.py

@@ -22,6 +22,7 b' from IPython import get_ipython'
 from IPython.testing.tools import AssertPrints, AssertNotPrints
 from IPython.utils.path import compress_user
 
+
 #-----------------------------------------------------------------------------
 # Globals and constants
 #-----------------------------------------------------------------------------
@@ -433,12 +434,12 b' def test_builtin_init():'
 
 
 def test_render_signature_short():
-    def short_fun(a: int = 1): pass
+    def short_fun(a=1): pass
     sig = oinspect._render_signature(
         signature(short_fun),
         short_fun.__name__,
     )
-    nt.assert_equal(sig, 'short_fun(a: int = 1)')
+    nt.assert_equal(sig, 'short_fun(a=1)')
 
 
 def test_render_signature_long():
@@ -454,10 +455,20 b' def test_render_signature_long():'
         signature(long_function),
         long_function.__name__,
     )
-    nt.assert_equal(sig, '''\
+    nt.assert_in(sig, [
+        # Python >=3.7
+        '''\
+long_function(
+    a_really_long_parameter: int,
+    and_another_long_one: bool = False,
+    let_us_make_sure_this_is_looong: Union[str, NoneType] = None,
+) -> bool\
+''',  # Python <=3.6
+        '''\
 long_function(
     a_really_long_parameter: int,
     and_another_long_one: bool = False,
     let_us_make_sure_this_is_looong: Union[str, NoneType] = None,
 ) -> bool\
-''')
+''',
+    ])