diff --git a/openflexure_microscope/api/dev_extensions/__init__.py b/openflexure_microscope/api/dev_extensions/__init__.py
index b893e6a0..e951fc64 100644
--- a/openflexure_microscope/api/dev_extensions/__init__.py
+++ b/openflexure_microscope/api/dev_extensions/__init__.py
@@ -1 +1 @@
-from .raiser import raiser_extension_v2
\ No newline at end of file
+from .tools import devtools_extension_v2
\ No newline at end of file
diff --git a/openflexure_microscope/api/dev_extensions/raiser.py b/openflexure_microscope/api/dev_extensions/raiser.py
deleted file mode 100644
index 1098fefe..00000000
--- a/openflexure_microscope/api/dev_extensions/raiser.py
+++ /dev/null
@@ -1,14 +0,0 @@
-from labthings.server.extensions import BaseExtension
-from labthings.server.view import ActionView
-
-class RaiseException(ActionView):
-    def post(self):
-        raise Exception("The developer raised an exception")
-
-raiser_extension_v2 = BaseExtension(
-    "org.openflexure.dev.raiser",
-    version="0.1.0",
-    description="Actions to cause various traumatic events in the microscope, used for testing.",
-)
-
-raiser_extension_v2.add_view(RaiseException, "/raise")
\ No newline at end of file
diff --git a/openflexure_microscope/api/dev_extensions/tools.py b/openflexure_microscope/api/dev_extensions/tools.py
new file mode 100644
index 00000000..564dcd6d
--- /dev/null
+++ b/openflexure_microscope/api/dev_extensions/tools.py
@@ -0,0 +1,37 @@
+from labthings.server.extensions import BaseExtension
+from labthings.server.view import ActionView
+
+from labthings.server import fields
+from labthings.server.decorators import use_args, marshal_with
+
+import logging
+import time
+
+class RaiseException(ActionView):
+    def post(self):
+        raise Exception("The developer raised an exception")
+
+class SleepFor(ActionView):
+    @marshal_with({
+        "TimeAsleep": fields.Float()
+    })
+    @use_args({
+        "time": fields.Float(description="Time to sleep, in seconds", example=0.5)
+    })
+    def post(self, args):
+        sleep_time = args.get("time")
+        logging.info(f"Going to sleep for {sleep_time}...")
+        start = time.time()
+        time.sleep(sleep_time)
+        end = time.time()
+        logging.info("Waking up!")
+        return {"TimeAsleep": (end - start)}
+
+devtools_extension_v2 = BaseExtension(
+    "org.openflexure.dev.tools",
+    version="0.1.0",
+    description="Actions to cause various traumatic events in the microscope, used for testing.",
+)
+
+devtools_extension_v2.add_view(RaiseException, "/raise")
+devtools_extension_v2.add_view(SleepFor, "/sleep")
\ No newline at end of file