diff --git a/imperative/python/test/unit/core/test_async_level.py b/imperative/python/test/unit/core/test_async_level.py
deleted file mode 100644
index 72cee0e8..00000000
--- a/imperative/python/test/unit/core/test_async_level.py
+++ /dev/null
@@ -1,35 +0,0 @@
-import pytest
-
-import megengine as mge
-import megengine.functional as F
-from megengine.core._imperative_rt.core2 import config_async_level, get_async_level
-
-
-def test_basic():
-    config_async_level(2)
-    assert get_async_level() == 2
-    with pytest.raises(RuntimeError):
-        config_async_level(3)
-
-
-def test_level1_infer_value():
-    config_async_level(1)
-    a = mge.tensor([[1, 2], [2, 3], [3, 4]], dtype="float32")
-    b = mge.tensor([1, 1], dtype="float32")
-    # make DepType::VALUE unknown
-    c = b * 2
-    with pytest.raises(RuntimeError):
-        d = F.reshape(a, c)
-
-
-def test_level1_infer_shape_with_unknown():
-    config_async_level(2)
-    a = mge.tensor([[1, 2, 2, 3]], dtype="float32")
-    b = mge.tensor([1, 1])
-    c = b * 2
-    # make DepType::SHAPE unknown
-    d = F.reshape(a, c)
-    config_async_level(1)
-    e = mge.tensor([[1, 2]], dtype="float32")
-    with pytest.raises(RuntimeError):
-        f = F.matmul(d, e)
diff --git a/imperative/python/test/unit/core/test_interpreter.py b/imperative/python/test/unit/core/test_interpreter.py
new file mode 100644
index 00000000..cee94b61
--- /dev/null
+++ b/imperative/python/test/unit/core/test_interpreter.py
@@ -0,0 +1,78 @@
+import numpy as np
+import pytest
+
+import megengine as mge
+import megengine.functional as F
+from megengine.core._imperative_rt.core2 import (
+    _set_drop_flag,
+    _set_swap_flag,
+    config_async_level,
+    get_async_level,
+)
+
+
+def test_basic():
+    config_async_level(2)
+    assert get_async_level() == 2
+    with pytest.raises(RuntimeError):
+        config_async_level(3)
+
+
+def test_level1_infer_value():
+    config_async_level(1)
+    a = mge.tensor([[1, 2], [2, 3], [3, 4]], dtype="float32")
+    b = mge.tensor([1, 1], dtype="float32")
+    identity = mge.tensor(np.array([[1, 0], [0, 1]]), dtype="float32")
+    # make DepType::VALUE unknown
+    c = F.matmul(b, identity)
+    with pytest.raises(RuntimeError):
+        d = F.reshape(a, c)
+    config_async_level(2)
+
+
+def test_level1_infer_shape_with_unknown():
+    config_async_level(2)
+    a = mge.tensor([[1, 2, 2, 3]], dtype="float32")
+    b = mge.tensor([1, 1])
+    multi2 = mge.tensor(np.array([[2, 0], [0, 2]]), dtype="float32")
+    c = F.matmul(b, multi2)
+    # make DepType::SHAPE unknown
+    d = F.reshape(a, c)
+    e = mge.tensor([[1, 2]], dtype="float32")
+    config_async_level(1)
+    # test src no shape, throw in level1
+    with pytest.raises(RuntimeError):
+        f = F.reshape(d, b)
+    with pytest.raises(RuntimeError):
+        g = F.matmul(d, e)
+    config_async_level(2)
+
+
+def test_host_compute_elemwise():
+    a = mge.tensor([[1, 2], [2, 3], [3, 4]], dtype="float32")
+    b = mge.tensor([1, 1], dtype="int32")
+    # check DepType::VALUE is still known
+    c = b * 2
+    with pytest.raises(RuntimeError):
+        d = F.reshape(a, c)
+
+
+def test_swap_drop_basic():
+    _set_swap_flag(True)
+    _set_drop_flag(True)
+    # test xpu compute
+    x = mge.tensor(np.ones((3, 3)), dtype=np.float32)
+    y = mge.tensor(np.ones((3, 3)), dtype=np.float32)
+    z = x + y
+    x._swap_out()
+    z._drop()
+    z.numpy()
+    # test host value compute
+    x = mge.tensor(np.ones((2, 2)), dtype=np.float32)
+    y = mge.tensor(np.ones((2, 2)), dtype=np.float32)
+    z = x + y
+    x._swap_out()
+    z._drop()
+    z.numpy()
+    _set_swap_flag(False)
+    _set_drop_flag(False)