Do not trigger pytest_warning_captured in pytest 6.0+

Fix #562

changelog/562.bugfix.rst

@@ -0,0 +1 @@
+Do not trigger the deprecated ``pytest_warning_captured`` in pytest 6.0+.

src/xdist/remote.py

@@ -139,18 +139,6 @@ class WorkerInteractor(object):
                 fslocation=str(fslocation),
             )
 
-    # the pytest_warning_captured hook was introduced in pytest 3.8
-    if hasattr(_pytest.hookspec, "pytest_warning_captured"):
-
-        def pytest_warning_captured(self, warning_message, when, item):
-            self.sendevent(
-                "warning_captured",
-                warning_message_data=serialize_warning_message(warning_message),
-                when=when,
-                # item cannot be serialized and will always be None when used with xdist
-                item=None,
-            )
-
     # the pytest_warning_recorded hook was introduced in pytest 6.0
     if hasattr(_pytest.hookspec, "pytest_warning_recorded"):
 
@@ -163,6 +151,18 @@ class WorkerInteractor(object):
                 location=location,
             )
 
+    # the pytest_warning_captured hook was introduced in pytest 3.8
+    elif hasattr(_pytest.hookspec, "pytest_warning_captured"):
+
+        def pytest_warning_captured(self, warning_message, when, item):
+            self.sendevent(
+                "warning_captured",
+                warning_message_data=serialize_warning_message(warning_message),
+                when=when,
+                # item cannot be serialized and will always be None when used with xdist
+                item=None,
+            )
+
 
 def serialize_warning_message(warning_message):
     if isinstance(warning_message.message, Warning):

testing/acceptance_test.py

@@ -820,6 +820,32 @@ class TestWarnings:
         result = testdir.runpytest(n)
         result.stdout.fnmatch_lines(["*this is a warning*", "*1 passed, 1 warning*"])
 
+    def test_warning_captured_deprecated_in_pytest_6(self, testdir):
+        """
+        Do not trigger the deprecated pytest_warning_captured hook in pytest 6+ (#562)
+        """
+        import _pytest.hookspec
+
+        if not hasattr(_pytest.hookspec, "pytest_warning_recorded"):
+            pytest.skip("test requires pytest 6.0+")
+
+        testdir.makeconftest(
+            """
+            def pytest_warning_captured():
+                assert False, "this hook should not be called in this version"
+        """
+        )
+        testdir.makepyfile(
+            """
+            import warnings
+            def test():
+                warnings.warn("custom warning")
+        """
+        )
+        result = testdir.runpytest("-n1")
+        result.stdout.fnmatch_lines(["* 1 passed in *"])
+        result.stdout.no_fnmatch_line("*this hook should not be called in this version")
+
     @pytest.mark.parametrize("n", ["-n0", "-n1"])
     def test_custom_subclass(self, testdir, n):
         """Check that warning subclasses that don't honor the args attribute don't break