py36+: remove _pytest.compat.MODULE_NOT_FOUND_ERROR

src/_pytest/compat.py

@@ -46,11 +46,6 @@ class NotSetType(enum.Enum):
 NOTSET = NotSetType.token  # type: Final # noqa: E305
 # fmt: on
 
-MODULE_NOT_FOUND_ERROR = (
-    "ModuleNotFoundError" if sys.version_info[:2] >= (3, 6) else "ImportError"
-)
-
-
 if sys.version_info >= (3, 8):
     from importlib import metadata as importlib_metadata
 else:

testing/acceptance_test.py

@@ -210,9 +210,6 @@ class TestGeneralUsage:
         """
         )
         result = testdir.runpytest()
-        exc_name = (
-            "ModuleNotFoundError" if sys.version_info >= (3, 6) else "ImportError"
-        )
         assert result.stdout.lines == []
         assert result.stderr.lines == [
             "ImportError while loading conftest '{}'.".format(conftest),
@@ -220,7 +217,7 @@ class TestGeneralUsage:
             "    foo()",
             "conftest.py:2: in foo",
             "    import qwerty",
-            "E   {}: No module named 'qwerty'".format(exc_name),
+            "E   ModuleNotFoundError: No module named 'qwerty'",
         ]
 
     def test_early_skip(self, testdir):

testing/test_collection.py

@@ -1383,13 +1383,10 @@ class TestImportModeImportlib:
         """
         self.setup_conftest_and_foo(testdir)
         result = testdir.runpytest("-v", "--import-mode=importlib")
-        exc_name = (
-            "ModuleNotFoundError" if sys.version_info[:2] > (3, 5) else "ImportError"
-        )
         result.stdout.fnmatch_lines(
             [
-                "*{}: No module named 'foo'".format(exc_name),
-                "tests?test_foo.py:2: {}".format(exc_name),
+                "*ModuleNotFoundError: No module named 'foo'",
+                "tests?test_foo.py:2: ModuleNotFoundError",
                 "* 1 failed in *",
             ]
         )

testing/test_doctest.py

@@ -4,7 +4,6 @@ from typing import Callable
 from typing import Optional
 
 import pytest
-from _pytest.compat import MODULE_NOT_FOUND_ERROR
 from _pytest.doctest import _get_checker
 from _pytest.doctest import _is_mocked
 from _pytest.doctest import _is_setup_py
@@ -399,8 +398,8 @@ class TestDoctests:
         result.stdout.fnmatch_lines(
             [
                 "*>>> import asdals*",
-                "*UNEXPECTED*{e}*".format(e=MODULE_NOT_FOUND_ERROR),
-                "{e}: No module named *asdal*".format(e=MODULE_NOT_FOUND_ERROR),
+                "*UNEXPECTED*ModuleNotFoundError*",
+                "ModuleNotFoundError: No module named *asdal*",
             ]
         )
 
@@ -423,7 +422,7 @@ class TestDoctests:
         result.stdout.fnmatch_lines(
             [
                 "*ERROR collecting hello.py*",
-                "*{e}: No module named *asdals*".format(e=MODULE_NOT_FOUND_ERROR),
+                "*ModuleNotFoundError: No module named *asdals*",
                 "*Interrupted: 1 error during collection*",
             ]
         )