diff --git a/IPython/core/tests/test_inputtransformer2.py b/IPython/core/tests/test_inputtransformer2.py
index b00d1a8..f29bb2a 100644
--- a/IPython/core/tests/test_inputtransformer2.py
+++ b/IPython/core/tests/test_inputtransformer2.py
@@ -12,7 +12,6 @@ import pytest
 
 from IPython.core import inputtransformer2 as ipt2
 from IPython.core.inputtransformer2 import _find_assign_op, make_tokens_by_line
-from IPython.testing.decorators import skip_iptest_but_not_pytest
 
 MULTILINE_MAGIC = ("""\
 a = f()
@@ -285,14 +284,12 @@ examples = [
 ]
 
 
-@skip_iptest_but_not_pytest
 @pytest.mark.parametrize("code, expected, number", examples)
 def test_check_complete_param(code, expected, number):
     cc = ipt2.TransformerManager().check_complete
     assert cc(code) == (expected, number)
 
 
-@skip_iptest_but_not_pytest
 @pytest.mark.xfail(
     reason="Bug in python 3.9.8 – bpo 45738",
     condition=sys.version_info[:3] == (3, 9, 8),
diff --git a/IPython/core/tests/test_magic.py b/IPython/core/tests/test_magic.py
index 0cadae6..95bd85b 100644
--- a/IPython/core/tests/test_magic.py
+++ b/IPython/core/tests/test_magic.py
@@ -972,7 +972,6 @@ def event_loop():
     yield asyncio.get_event_loop_policy().get_event_loop()
 
 
-@dec.skip_iptest_but_not_pytest
 @dec.skip_win32
 @pytest.mark.skipif(
     sys.platform == "win32", reason="This test does not run under Windows"
@@ -986,7 +985,6 @@ def test_script_out(event_loop):
     assert ip.user_ns["output"] == "hi\n"
 
 
-@dec.skip_iptest_but_not_pytest
 @dec.skip_win32
 @pytest.mark.skipif(
     sys.platform == "win32", reason="This test does not run under Windows"
@@ -999,7 +997,6 @@ def test_script_err(event_loop):
     assert ip.user_ns["error"] == "hello\n"
 
 
-@dec.skip_iptest_but_not_pytest
 @dec.skip_win32
 @pytest.mark.skipif(
     sys.platform == "win32", reason="This test does not run under Windows"
@@ -1014,7 +1011,6 @@ def test_script_out_err():
     assert ip.user_ns["error"] == "hello\n"
 
 
-@dec.skip_iptest_but_not_pytest
 @dec.skip_win32
 @pytest.mark.skipif(
     sys.platform == "win32", reason="This test does not run under Windows"
@@ -1027,7 +1023,6 @@ async def test_script_bg_out(event_loop):
     event_loop.stop()
 
 
-@dec.skip_iptest_but_not_pytest
 @dec.skip_win32
 @pytest.mark.skipif(
     sys.platform == "win32", reason="This test does not run under Windows"
@@ -1039,7 +1034,6 @@ async def test_script_bg_err():
     ip.user_ns["error"].close()
 
 
-@dec.skip_iptest_but_not_pytest
 @dec.skip_win32
 @pytest.mark.skipif(
     sys.platform == "win32", reason="This test does not run under Windows"
diff --git a/IPython/lib/tests/test_latextools.py b/IPython/lib/tests/test_latextools.py
index 60a7589..ead73ab 100644
--- a/IPython/lib/tests/test_latextools.py
+++ b/IPython/lib/tests/test_latextools.py
@@ -11,13 +11,11 @@ from IPython.lib import latextools
 from IPython.testing.decorators import (
     onlyif_cmds_exist,
     skipif_not_matplotlib,
-    skip_iptest_but_not_pytest,
 )
 from IPython.utils.process import FindCmdError
 
 
 @pytest.mark.parametrize('command', ['latex', 'dvipng'])
-@skip_iptest_but_not_pytest
 def test_check_latex_to_png_dvipng_fails_when_no_cmd(command):
     def mock_find_cmd(arg):
         if arg == command:
@@ -32,7 +30,6 @@ def no_op(*args, **kwargs):
     yield
 
 
-@skip_iptest_but_not_pytest
 @onlyif_cmds_exist("latex", "dvipng")
 @pytest.mark.parametrize("s, wrap", [(u"$$x^2$$", False), (u"x^2", True)])
 def test_latex_to_png_dvipng_runs(s, wrap):
@@ -60,7 +57,6 @@ def patch_latextool(mock=mock_kpsewhich):
 
 @pytest.mark.parametrize('context', [no_op, patch_latextool])
 @pytest.mark.parametrize('s_wrap', [("$x^2$", False), ("x^2", True)])
-@skip_iptest_but_not_pytest
 def test_latex_to_png_mpl_runs(s_wrap, context):
     """
     Test that latex_to_png_mpl just runs without error.
diff --git a/IPython/lib/tests/test_pretty.py b/IPython/lib/tests/test_pretty.py
index ec1211a..8b8a6ee 100644
--- a/IPython/lib/tests/test_pretty.py
+++ b/IPython/lib/tests/test_pretty.py
@@ -16,7 +16,6 @@ import unittest
 import pytest
 
 from IPython.lib import pretty
-from IPython.testing.decorators import skip_iptest_but_not_pytest
 
 from io import StringIO
 
@@ -129,7 +128,6 @@ def test_callability_checking():
         ],
     ),
 )
-@skip_iptest_but_not_pytest
 def test_sets(obj, expected_output):
     """
     Test that set and frozenset use Python 3 formatting.
diff --git a/IPython/testing/decorators.py b/IPython/testing/decorators.py
index 74af7c1..93f55d9 100644
--- a/IPython/testing/decorators.py
+++ b/IPython/testing/decorators.py
@@ -149,17 +149,6 @@ def make_label_dec(label, ds=None):
     return decor
 
 
-def skip_iptest_but_not_pytest(f):
-    """
-    Warning this will make the test invisible to iptest.
-    """
-    import os
-
-    if os.environ.get("IPTEST_WORKING_DIR", None) is not None:
-        f.__test__ = False
-    return f
-
-
 def skipif(skip_condition, msg=None):
     """Make function raise SkipTest exception if skip_condition is true
 
diff --git a/IPython/utils/tests/test_capture.py b/IPython/utils/tests/test_capture.py
index 3cfa827..8645ed1 100644
--- a/IPython/utils/tests/test_capture.py
+++ b/IPython/utils/tests/test_capture.py
@@ -17,8 +17,6 @@ import sys
 
 import pytest
 
-from IPython.testing.decorators import skip_iptest_but_not_pytest
-
 from IPython.utils import capture
 
 #-----------------------------------------------------------------------------
@@ -69,7 +67,6 @@ hello_stderr = "hello, stderr"
 # Test Functions
 #-----------------------------------------------------------------------------
 @pytest.mark.parametrize("method_mime", _mime_map.items())
-@skip_iptest_but_not_pytest
 def test_rich_output_empty(method_mime):
     """RichOutput with no args"""
     rich = capture.RichOutput()
@@ -88,7 +85,6 @@ def test_rich_output():
     assert rich._repr_svg_() is None
 
 
-@skip_iptest_but_not_pytest
 @pytest.mark.parametrize("method_mime", _mime_map.items())
 def test_rich_output_no_metadata(method_mime):
     """test RichOutput with no metadata"""
@@ -98,7 +94,6 @@ def test_rich_output_no_metadata(method_mime):
     assert getattr(rich, method)() == data[mime]
 
 
-@skip_iptest_but_not_pytest
 @pytest.mark.parametrize("method_mime", _mime_map.items())
 def test_rich_output_metadata(method_mime):
     """test RichOutput with metadata"""
diff --git a/IPython/utils/tests/test_pycolorize.py b/IPython/utils/tests/test_pycolorize.py
index 178f4a9..05d51b6 100644
--- a/IPython/utils/tests/test_pycolorize.py
+++ b/IPython/utils/tests/test_pycolorize.py
@@ -17,8 +17,6 @@ Authors
 # Imports
 #-----------------------------------------------------------------------------
 
-from IPython.testing.decorators import skip_iptest_but_not_pytest
-
 # our own
 from IPython.utils.PyColorize import Parser
 import io
@@ -53,7 +51,6 @@ class Bar(Super):
 """
 
 
-@skip_iptest_but_not_pytest
 def test_parse_sample(style):
     """and test writing to a buffer"""
     buf = io.StringIO()
@@ -65,7 +62,6 @@ def test_parse_sample(style):
     assert "ERROR" not in f1
 
 
-@skip_iptest_but_not_pytest
 def test_parse_error(style):
     p = Parser(style=style)
     f1 = p.format(")", "str")
diff --git a/IPython/utils/tests/test_tokenutil.py b/IPython/utils/tests/test_tokenutil.py
index 406c0ae..c4539d1 100644
--- a/IPython/utils/tests/test_tokenutil.py
+++ b/IPython/utils/tests/test_tokenutil.py
@@ -3,7 +3,6 @@
 # Distributed under the terms of the Modified BSD License.
 
 import pytest
-from IPython.testing.decorators import skip_iptest_but_not_pytest
 
 from IPython.utils.tokenutil import token_at_cursor, line_at_cursor
 
@@ -132,7 +131,6 @@ def test_line_at_cursor():
         ["int"] * (22 - 16) + ["map"] * (28 - 22),
     ),
 )
-@skip_iptest_but_not_pytest
 def test_multiline_statement(c, token):
     cell = """a = (1,
     3)