diff --git a/hypothesis-python/src/hypothesis/core.py b/hypothesis-python/src/hypothesis/core.py
index 662c5f43c0..e000da174f 100644
--- a/hypothesis-python/src/hypothesis/core.py
+++ b/hypothesis-python/src/hypothesis/core.py
@@ -91,6 +91,7 @@
 from hypothesis.internal.observability import (
     OBSERVABILITY_COLLECT_COVERAGE,
     TESTCASE_CALLBACKS,
+    _system_metadata,
     deliver_json_blob,
     make_testcase,
 )
@@ -1066,7 +1067,6 @@ def _execute_once_for_engine(self, data: ConjectureData) -> None:
                     string_repr=self._string_repr,
                     arguments={**self._jsonable_arguments, **data._observability_args},
                     timing=self._timing_features,
-                    metadata={},
                     coverage=tractable_coverage_report(trace) or None,
                 )
                 deliver_json_blob(tc)
@@ -1198,6 +1198,7 @@ def run_engine(self):
                     "metadata": {
                         "traceback": tb,
                         "predicates": ran_example._observability_predicates,
+                        **_system_metadata(),
                     },
                 }
                 deliver_json_blob(tc)
diff --git a/hypothesis-python/src/hypothesis/internal/observability.py b/hypothesis-python/src/hypothesis/internal/observability.py
index e389f54862..98753985f1 100644
--- a/hypothesis-python/src/hypothesis/internal/observability.py
+++ b/hypothesis-python/src/hypothesis/internal/observability.py
@@ -13,8 +13,10 @@
 import json
 import os
 import sys
+import time
 import warnings
 from datetime import date, timedelta
+from functools import lru_cache
 from typing import Callable, Dict, List, Optional
 
 from hypothesis.configuration import storage_directory
@@ -38,7 +40,6 @@ def make_testcase(
     string_repr: str = "<unknown>",
     arguments: Optional[dict] = None,
     timing: Dict[str, float],
-    metadata: Optional[dict] = None,
     coverage: Optional[Dict[str, List[int]]] = None,
 ) -> dict:
     if data.interesting_origin:
@@ -68,9 +69,9 @@ def make_testcase(
         },
         "timing": timing,
         "metadata": {
-            **(metadata or {}),
             "traceback": getattr(data.extra_information, "_expected_traceback", None),
             "predicates": data._observability_predicates,
+            **_system_metadata(),
         },
         "coverage": coverage,
     }
@@ -88,6 +89,18 @@ def _deliver_to_file(value):  # pragma: no cover
         f.write(json.dumps(value) + "\n")
 
 
+_imported_at = time.time()
+
+
+@lru_cache
+def _system_metadata():
+    return {
+        "sys.argv": sys.argv,
+        "os.getpid()": os.getpid(),
+        "imported_at": _imported_at,
+    }
+
+
 OBSERVABILITY_COLLECT_COVERAGE = (
     "HYPOTHESIS_EXPERIMENTAL_OBSERVABILITY_NOCOVER" not in os.environ
 )