diff --git a/src/_pytest/main.py b/src/_pytest/main.py
index 052b49b5f4e..3aa36c80f14 100644
--- a/src/_pytest/main.py
+++ b/src/_pytest/main.py
@@ -1,6 +1,6 @@
 """ core implementation of testing process: init, session, runtest loop. """
-import fnmatch
 import enum
+import fnmatch
 import functools
 import os
 import pkgutil
@@ -202,7 +202,7 @@ def wrap_session(config, doit):
             initstate = 2
             session.exitstatus = doit(config, session) or 0
         except UsageError:
-            session.exitstatus = EXIT_USAGEERROR
+            session.exitstatus = ExitCode.USAGE_ERROR
             raise
         except Failed:
             session.exitstatus = ExitCode.TESTS_FAILED
diff --git a/testing/acceptance_test.py b/testing/acceptance_test.py
index 73224420914..60cc21c4a01 100644
--- a/testing/acceptance_test.py
+++ b/testing/acceptance_test.py
@@ -409,10 +409,10 @@ def test_a():
     def test_report_all_failed_collections_initargs(self, testdir):
         testdir.makeconftest(
             """
-            from _pytest.main import EXIT_USAGEERROR
+            from _pytest.main import ExitCode
 
             def pytest_sessionfinish(exitstatus):
-                assert exitstatus == EXIT_USAGEERROR
+                assert exitstatus == ExitCode.USAGE_ERROR
                 print("pytest_sessionfinish_called")
             """
         )
@@ -420,7 +420,7 @@ def pytest_sessionfinish(exitstatus):
         result = testdir.runpytest("test_a.py::a", "test_b.py::b")
         result.stderr.fnmatch_lines(["*ERROR*test_a.py::a*", "*ERROR*test_b.py::b*"])
         result.stdout.fnmatch_lines(["pytest_sessionfinish_called"])
-        assert result.ret == EXIT_USAGEERROR
+        assert result.ret == ExitCode.USAGE_ERROR
 
     @pytest.mark.usefixtures("recwarn")
     def test_namespace_import_doesnt_confuse_import_hook(self, testdir):
diff --git a/testing/test_cacheprovider.py b/testing/test_cacheprovider.py
index a2e701740a0..cbba27e5f5d 100644
--- a/testing/test_cacheprovider.py
+++ b/testing/test_cacheprovider.py
@@ -6,7 +6,7 @@
 import py
 
 import pytest
-from _pytest.main import EXIT_NOTESTSCOLLECTED
+from _pytest.main import ExitCode
 
 pytest_plugins = ("pytester",)
 
@@ -757,7 +757,7 @@ def test_2():
                 "* 2 deselected in *",
             ]
         )
-        assert result.ret == EXIT_NOTESTSCOLLECTED
+        assert result.ret == ExitCode.NO_TESTS_COLLECTED
 
     def test_lastfailed_no_failures_behavior_empty_cache(self, testdir):
         testdir.makepyfile(
diff --git a/testing/test_collection.py b/testing/test_collection.py
index 28202473108..864125c40af 100644
--- a/testing/test_collection.py
+++ b/testing/test_collection.py
@@ -383,7 +383,7 @@ def pytest_configure(config):
         testdir.makepyfile(test_world="def test_hello(): pass")
         testdir.makepyfile(test_welt="def test_hallo(): pass")
         result = testdir.runpytest()
-        assert result.ret == EXIT_NOTESTSCOLLECTED
+        assert result.ret == ExitCode.NO_TESTS_COLLECTED
         result.stdout.fnmatch_lines(["*collected 0 items*"])
         result = testdir.runpytest("--XX")
         assert result.ret == 0
@@ -1171,7 +1171,7 @@ def test_collectignore_via_conftest(testdir, monkeypatch):
     ignore_me.ensure("conftest.py").write("assert 0, 'should_not_be_called'")
 
     result = testdir.runpytest()
-    assert result.ret == EXIT_NOTESTSCOLLECTED
+    assert result.ret == ExitCode.NO_TESTS_COLLECTED
 
 
 def test_collect_pkg_init_and_file_in_args(testdir):
@@ -1233,7 +1233,7 @@ def test_collect_sub_with_symlinks(use_pkg, testdir):
 def test_collector_respects_tbstyle(testdir):
     p1 = testdir.makepyfile("assert 0")
     result = testdir.runpytest(p1, "--tb=native")
-    assert result.ret == EXIT_INTERRUPTED
+    assert result.ret == ExitCode.INTERRUPTED
     result.stdout.fnmatch_lines(
         [
             "*_ ERROR collecting test_collector_respects_tbstyle.py _*",
diff --git a/testing/test_config.py b/testing/test_config.py
index 8c3811b76b3..b9fc388d236 100644
--- a/testing/test_config.py
+++ b/testing/test_config.py
@@ -11,9 +11,6 @@
 from _pytest.config.findpaths import get_common_ancestor
 from _pytest.config.findpaths import getcfg
 from _pytest.main import ExitCode
-from _pytest.main import EXIT_OK
-from _pytest.main import EXIT_TESTSFAILED
-from _pytest.main import EXIT_USAGEERROR
 
 
 class TestParseIni:
@@ -1175,13 +1172,13 @@ def pytest_addoption(parser):
     )
     # Does not display full/default help.
     assert "to see available markers type: pytest --markers" not in result.stdout.lines
-    assert result.ret == EXIT_USAGEERROR
+    assert result.ret == ExitCode.USAGE_ERROR
 
     result = testdir.runpytest("--version")
     result.stderr.fnmatch_lines(
         ["*pytest*{}*imported from*".format(pytest.__version__)]
     )
-    assert result.ret == EXIT_USAGEERROR
+    assert result.ret == ExitCode.USAGE_ERROR
 
 
 def test_config_does_not_load_blocked_plugin_from_args(testdir):
@@ -1189,11 +1186,11 @@ def test_config_does_not_load_blocked_plugin_from_args(testdir):
     p = testdir.makepyfile("def test(capfd): pass")
     result = testdir.runpytest(str(p), "-pno:capture")
     result.stdout.fnmatch_lines(["E       fixture 'capfd' not found"])
-    assert result.ret == EXIT_TESTSFAILED
+    assert result.ret == ExitCode.TESTS_FAILED
 
     result = testdir.runpytest(str(p), "-pno:capture", "-s")
     result.stderr.fnmatch_lines(["*: error: unrecognized arguments: -s"])
-    assert result.ret == EXIT_USAGEERROR
+    assert result.ret == ExitCode.USAGE_ERROR
 
 
 @pytest.mark.parametrize(
@@ -1219,7 +1216,7 @@ def test_config_blocked_default_plugins(testdir, plugin):
     result = testdir.runpytest(str(p), "-pno:%s" % plugin)
 
     if plugin == "python":
-        assert result.ret == EXIT_USAGEERROR
+        assert result.ret == ExitCode.USAGE_ERROR
         result.stderr.fnmatch_lines(
             [
                 "ERROR: not found: */test_config_blocked_default_plugins.py",
@@ -1228,13 +1225,13 @@ def test_config_blocked_default_plugins(testdir, plugin):
         )
         return
 
-    assert result.ret == EXIT_OK
+    assert result.ret == ExitCode.OK
     if plugin != "terminal":
         result.stdout.fnmatch_lines(["* 1 passed in *"])
 
     p = testdir.makepyfile("def test(): assert 0")
     result = testdir.runpytest(str(p), "-pno:%s" % plugin)
-    assert result.ret == EXIT_TESTSFAILED
+    assert result.ret == ExitCode.TESTS_FAILED
     if plugin != "terminal":
         result.stdout.fnmatch_lines(["* 1 failed in *"])
     else:
diff --git a/testing/test_conftest.py b/testing/test_conftest.py
index 2fdd8f13f47..447416f1076 100644
--- a/testing/test_conftest.py
+++ b/testing/test_conftest.py
@@ -272,7 +272,7 @@ def fixture():
     build.chdir()
     result = testdir.runpytest("-vs", "app/test_foo.py")
     result.stdout.fnmatch_lines(["*conftest_loaded*", "PASSED"])
-    assert result.ret == EXIT_OK
+    assert result.ret == ExitCode.OK
 
 
 def test_no_conftest(testdir):
diff --git a/testing/test_mark.py b/testing/test_mark.py
index 8d97f8b4ef5..c22e9dbb5de 100644
--- a/testing/test_mark.py
+++ b/testing/test_mark.py
@@ -3,7 +3,7 @@
 from unittest import mock
 
 import pytest
-from _pytest.main import EXIT_INTERRUPTED
+from _pytest.main import ExitCode
 from _pytest.mark import EMPTY_PARAMETERSET_OPTION
 from _pytest.mark import MarkGenerator as Mark
 from _pytest.nodes import Collector
@@ -903,7 +903,7 @@ def test():
             "*= 1 error in *",
         ]
     )
-    assert result.ret == EXIT_INTERRUPTED
+    assert result.ret == ExitCode.INTERRUPTED
 
 
 def test_parameterset_for_parametrize_bad_markname(testdir):