diff --git a/src/pytestsysstats/plugin.py b/src/pytestsysstats/plugin.py
index 4009858..3067f73 100644
--- a/src/pytestsysstats/plugin.py
+++ b/src/pytestsysstats/plugin.py
@@ -231,20 +231,17 @@ def pytest_sessionstart(session: "Session") -> None:
     ):
         stats_processes_instance = StatsProcesses()
         stats_processes_instance.add("Test Suite Run", os.getpid())
-    else:
-        stats_processes_instance = None
+        session.config.pluginmanager.register(stats_processes_instance, "sysstats-processes")
 
-    session.config.pluginmanager.register(stats_processes_instance, "sysstats-processes")
-
-    terminalreporter = session.config.pluginmanager.getplugin(
-        "terminalreporter"
-    )  # type: "TerminalReporter"
-    sys_stats_reporter = SystemStatsReporter(
-        config=session.config,
-        stats_processes=stats_processes_instance,
-        terminalreporter=terminalreporter,
-    )
-    session.config.pluginmanager.register(sys_stats_reporter, "sysstats-reporter")
+        terminalreporter = session.config.pluginmanager.getplugin(
+            "terminalreporter"
+        )  # type: "TerminalReporter"
+        sys_stats_reporter = SystemStatsReporter(
+            config=session.config,
+            stats_processes=stats_processes_instance,
+            terminalreporter=terminalreporter,
+        )
+        session.config.pluginmanager.register(sys_stats_reporter, "sysstats-reporter")
 
 
 @pytest.fixture(scope="session")  # type: ignore[misc]
@@ -252,5 +249,5 @@ def stats_processes(request: "SubRequest") -> StatsProcesses:
     """
     Session scoped process statistics tracker.
     """
-    plugin = request.config.pluginmanager.get_plugin("sysstats-processes")  # type: StatsProcesses
-    return plugin
+    if request.config.pluginmanager.has_plugin("sysstats-processes"):
+        return request.config.pluginmanager.get_plugin("sysstats-processes")  # type: StatsProcesses