diff --git a/debug_toolbar/panels/history/panel.py b/debug_toolbar/panels/history/panel.py
index 8bd0e8f65..3a55c9d51 100644
--- a/debug_toolbar/panels/history/panel.py
+++ b/debug_toolbar/panels/history/panel.py
@@ -87,7 +87,9 @@ def content(self):
         Fetch every store for the toolbar and include it in the template.
         """
         stores = {}
-        for id, toolbar in reversed(self.toolbar._store.items()):
+
+        list_obj = self.toolbar.fetch_all(self.toolbar)
+        for id, toolbar in reversed(list_obj.items()):
             stores[id] = {
                 "toolbar": toolbar,
                 "form": HistoryStoreForm(
diff --git a/debug_toolbar/panels/history/views.py b/debug_toolbar/panels/history/views.py
index 3fcbd9b32..165e13d9f 100644
--- a/debug_toolbar/panels/history/views.py
+++ b/debug_toolbar/panels/history/views.py
@@ -14,7 +14,8 @@ def history_sidebar(request):
 
     if form.is_valid():
         store_id = form.cleaned_data["store_id"]
-        toolbar = DebugToolbar.fetch(store_id)
+        tb = DebugToolbar(request, request)
+        toolbar = DebugToolbar.fetch(tb, store_id)
         exclude_history = form.cleaned_data["exclude_history"]
         context = {}
         if toolbar is None:
@@ -46,7 +47,9 @@ def history_refresh(request):
     if form.is_valid():
         requests = []
         # Convert to list to handle mutations happening in parallel
-        for id, toolbar in list(DebugToolbar._store.items()):
+        tb = DebugToolbar(request, request)
+        list_obj = DebugToolbar.fetch_all(tb)
+        for id, toolbar in list(list_obj.items()):
             requests.append(
                 {
                     "id": id,
diff --git a/debug_toolbar/settings.py b/debug_toolbar/settings.py
index bf534a7da..d7cfed2a6 100644
--- a/debug_toolbar/settings.py
+++ b/debug_toolbar/settings.py
@@ -42,6 +42,7 @@
     "SQL_WARNING_THRESHOLD": 500,  # milliseconds
     "OBSERVE_REQUEST_CALLBACK": "debug_toolbar.toolbar.observe_request",
     "TOOLBAR_LANGUAGE": None,
+    "CACHE_TIME": 100,
 }
 
 
diff --git a/debug_toolbar/toolbar.py b/debug_toolbar/toolbar.py
index 40e758107..ceaa8a8be 100644
--- a/debug_toolbar/toolbar.py
+++ b/debug_toolbar/toolbar.py
@@ -43,6 +43,7 @@ def __init__(self, request, get_response):
         self.stats = {}
         self.server_timing_stats = {}
         self.store_id = None
+        self.cache_key = "djangodebug_"
         self._created.send(request, toolbar=self)
 
     # Manage panels
@@ -75,6 +76,8 @@ def render_toolbar(self):
         """
         if not self.should_render_panels():
             self.store()
+        if self.tests_run():
+            return ""
         try:
             context = {"toolbar": self}
             lang = self.config["TOOLBAR_LANGUAGE"] or get_language()
@@ -90,6 +93,9 @@ def render_toolbar(self):
             else:
                 raise
 
+    def tests_run(self):
+        return self.config.get("TESTS_RUN", False)
+
     def should_render_panels(self):
         """Determine whether the panels should be rendered during the request
 
@@ -109,13 +115,55 @@ def store(self):
         if self.store_id:
             return
         self.store_id = uuid.uuid4().hex
-        self._store[self.store_id] = self
-        for _ in range(self.config["RESULTS_CACHE_SIZE"], len(self._store)):
-            self._store.popitem(last=False)
+
+        from django.core.cache import cache
+
+        data = {
+            "stats": self.stats,
+            "server_timing_stats": self.server_timing_stats,
+        }
+
+        cache.set(f"{self.cache_key}{self.store_id}", data, self.config["CACHE_TIME"])
+
+    @classmethod
+    def fetch(cls, tb, store_id):
+        from django.core.cache import cache
+
+        data = cache.get(f"{tb.cache_key}{store_id}")
+        if data:
+            tb.stats = data.get("stats", {})
+            tb.server_timing_stats = data.get("server_timing_stats", {})
+
+            sql_plugin_data = tb.stats.get("SQLPanel")
+            if sql_plugin_data:
+                databases_data = sql_plugin_data.get("databases", [("default", {})])[0][
+                    1
+                ]
+                tb._panels.get("SQLPanel")._num_queries = databases_data.get(
+                    "num_queries"
+                )
+                tb._panels.get("SQLPanel")._sql_time = sql_plugin_data.get("sql_time")
+        tb.store_id = store_id
+        return tb
 
     @classmethod
-    def fetch(cls, store_id):
-        return cls._store.get(store_id)
+    def fetch_all(cls, tb):
+        import copy
+
+        from django.core.cache import cache
+
+        data_dict = {}
+        key_list = cache.keys(f"{tb.cache_key}*")
+        for key in key_list:
+            store_id = key.split("_")[1]
+            data = cache.get(key)
+            new_tb = copy.copy(tb)
+            new_tb.stats = data["stats"]
+            new_tb.server_timing_stats = data["server_timing_stats"]
+            new_tb.store_id = store_id
+            data_dict[store_id] = new_tb
+
+        return data_dict
 
     # Manually implement class-level caching of panel classes and url patterns
     # because it's more obvious than going through an abstraction.
diff --git a/debug_toolbar/views.py b/debug_toolbar/views.py
index b93acbeed..448ffb491 100644
--- a/debug_toolbar/views.py
+++ b/debug_toolbar/views.py
@@ -10,7 +10,8 @@
 @render_with_toolbar_language
 def render_panel(request):
     """Render the contents of a panel"""
-    toolbar = DebugToolbar.fetch(request.GET["store_id"])
+    tb = DebugToolbar(request, request)
+    toolbar = DebugToolbar.fetch(tb, request.GET["store_id"])
     if toolbar is None:
         content = _(
             "Data for this panel isn't available anymore. "