Env var to skip loading of entrypoints.

hypothesis-python/RELEASE.rst

@@ -0,0 +1,5 @@
+RELEASE_TYPE: patch
+
+Read environment variable HYPOTHESIS_NO_ENTRYPOINTS to
+optionally skip loading of third-party plugin entrypoints.
+

hypothesis-python/src/hypothesis/entry_points.py

@@ -16,6 +16,7 @@
 """
 
 import importlib.metadata
+import os
 
 
 def get_entry_points():
@@ -29,7 +30,8 @@ def get_entry_points():
 
 
 def run():
-    for entry in get_entry_points():  # pragma: no cover
-        hook = entry.load()
-        if callable(hook):
-            hook()
+    if not os.environ.get("HYPOTHESIS_NO_ENTRYPOINTS"):
+        for entry in get_entry_points():  # pragma: no cover
+            hook = entry.load()
+            if callable(hook):
+                hook()

hypothesis-python/tests/cover/test_lazy_import.py

@@ -8,6 +8,7 @@
 # v. 2.0. If a copy of the MPL was not distributed with this file, You can
 # obtain one at https://mozilla.org/MPL/2.0/.
 
+import os
 import subprocess
 import sys
 
@@ -44,4 +45,7 @@ def test_hypothesis_does_not_import_test_runners(tmp_path):
     # See https://github.com/HypothesisWorks/hypothesis/pull/2204
     fname = tmp_path / "test.py"
     fname.write_text(SHOULD_NOT_IMPORT_TEST_RUNNERS, encoding="utf-8")
-    subprocess.check_call([sys.executable, str(fname)])
+    subprocess.check_call(
+        [sys.executable, str(fname)],
+        env=os.environ | {"HYPOTHESIS_NO_ENTRYPOINTS": "1"},
+    )