open-lambda · anhdduong · Feb 2, 2026 · Feb 15, 2026 · Feb 15, 2026 · Feb 15, 2026
diff --git a/examples/counter/f.py b/examples/counter/f.py
@@ -0,0 +1,5 @@
+counter = 0
+def f(event):
+    global counter
+    counter += 1
+    return counter
diff --git a/examples/counter/ol.yaml b/examples/counter/ol.yaml
@@ -0,0 +1,5 @@
+triggers:
+  http:
+    - method: POST
+
+reuse-sandbox: false
diff --git a/scripts/test.py b/scripts/test.py
@@ -224,6 +224,15 @@ def max_mem_alloc():
     # the function returns the MB that was able to be allocated
     assert limit-16 <= int(result) <= limit
 
+@test
+def fresh_sandbox_test():
+    open_lambda = OpenLambda()
+
+    num_calls = 2
+    for _ in range(num_calls):
+        result = open_lambda.run("counter", {})
+        assert_eq(result, 1) # fresh sandbox each call, counter always resets to 0 and increments to 1
+
 @test
 def ping_test():
     open_lambda = OpenLambda()
@@ -485,6 +494,9 @@ def run_tests():
     fork_bomb()
     max_mem_alloc()
 
+    # test sandbox-reuse flag behavior
+    fresh_sandbox_test()
+
     # numpy pip install needs a larger memory cap.
     # numpy also spawns threads using OpenBLAS, so a higher
     # process limit is needed.