diff --git a/python/paddle/tensor/math.py b/python/paddle/tensor/math.py
index 06439e143289b..3aad0a6a91a9a 100644
--- a/python/paddle/tensor/math.py
+++ b/python/paddle/tensor/math.py
@@ -4958,7 +4958,7 @@ def conj(x, name=None):
              [(4-4j), (5-5j), (6-6j)]])
 
     """
-    if in_dynamic_mode():
+    if in_dynamic_or_pir_mode():
         return _C_ops.conj(x)
     else:
         check_variable_and_dtype(
@@ -5863,7 +5863,7 @@ def _diff_handler(x, n=1, axis=-1, prepend=None, append=None, name=None):
         dtype = x.dtype
         axes = [axis]
         infer_flags = [1 for i in range(len(axes))]
-        if in_dynamic_mode():
+        if in_dynamic_or_pir_mode():
             has_pend = False
             input_list = []
             if prepend is not None and append is not None:
@@ -5900,7 +5900,7 @@ def _diff_handler(x, n=1, axis=-1, prepend=None, append=None, name=None):
                 new_input, axes, starts_2, ends_2, infer_flags, []
             )
 
-            if x.dtype == paddle.bool:
+            if x.dtype == paddle.bool or x.dtype == core.DataType.BOOL:
                 return _C_ops.logical_xor(input_back, input_front)
             else:
                 return _C_ops.subtract(input_back, input_front)
diff --git a/test/legacy_test/test_conj_op.py b/test/legacy_test/test_conj_op.py
index 4f552a3801c85..df7981e5a7cf4 100644
--- a/test/legacy_test/test_conj_op.py
+++ b/test/legacy_test/test_conj_op.py
@@ -26,6 +26,7 @@
 import paddle.base.dygraph as dg
 from paddle import static
 from paddle.base import core
+from paddle.pir_utils import test_with_pir_api
 
 paddle.enable_static()
 
@@ -50,12 +51,13 @@ def init_input_output(self):
         self.outputs = {'Out': out}
 
     def test_check_output(self):
-        self.check_output()
+        self.check_output(check_pir=True)
 
     def test_check_grad_normal(self):
         self.check_grad(
             ['X'],
             'Out',
+            check_pir=True,
         )
 
 
@@ -90,6 +92,7 @@ def test_conj_operator(self):
                     target = np.conj(input)
                     np.testing.assert_array_equal(result, target)
 
+    @test_with_pir_api
     def test_conj_static_mode(self):
         def init_input_output(dtype):
             input = rand([2, 20, 2, 3]).astype(dtype) + 1j * rand(
@@ -110,7 +113,7 @@ def init_input_output(dtype):
                     out = paddle.conj(x)
 
                     exe = static.Executor(place)
-                    out_value = exe.run(feed=input_dict, fetch_list=[out.name])
+                    out_value = exe.run(feed=input_dict, fetch_list=[out])
                     np.testing.assert_array_equal(np_res, out_value[0])
 
     def test_conj_api_real_number(self):
@@ -125,6 +128,7 @@ def test_conj_api_real_number(self):
 
 
 class Testfp16ConjOp(unittest.TestCase):
+    @test_with_pir_api
     def testfp16(self):
         input_x = (
             np.random.random((12, 14)) + 1j * np.random.random((12, 14))
@@ -170,11 +174,11 @@ def init_input_output(self):
 
     def test_check_output(self):
         place = core.CUDAPlace(0)
-        self.check_output_with_place(place)
+        self.check_output_with_place(place, check_pir=True)
 
     def test_check_grad(self):
         place = core.CUDAPlace(0)
-        self.check_grad_with_place(place, ['X'], 'Out')
+        self.check_grad_with_place(place, ['X'], 'Out', check_pir=True)
 
 
 if __name__ == "__main__":
diff --git a/test/legacy_test/test_diff_op.py b/test/legacy_test/test_diff_op.py
index bf7313ae61237..5d78b971c6b26 100644
--- a/test/legacy_test/test_diff_op.py
+++ b/test/legacy_test/test_diff_op.py
@@ -17,8 +17,9 @@
 import numpy as np
 
 import paddle
-from paddle import base
+from paddle import base, static
 from paddle.base import core
+from paddle.pir_utils import test_with_pir_api
 
 
 class TestDiffOp(unittest.TestCase):
@@ -77,13 +78,16 @@ def test_dygraph(self):
         self.setUp()
         self.func_dygraph()
 
+    @test_with_pir_api
     def test_static(self):
         paddle.enable_static()
         places = [base.CPUPlace()]
         if core.is_compiled_with_cuda():
             places.append(base.CUDAPlace(0))
         for place in places:
-            with base.program_guard(base.Program(), base.Program()):
+            with static.program_guard(
+                paddle.static.Program(), paddle.static.Program()
+            ):
                 x = paddle.static.data(
                     name="input", shape=self.input.shape, dtype=self.input.dtype
                 )
@@ -105,12 +109,12 @@ def test_static(self):
                         dtype=self.append.dtype,
                     )
 
-                exe = base.Executor(place)
+                exe = static.Executor(place)
                 out = paddle.diff(
                     x, n=self.n, axis=self.axis, prepend=prepend, append=append
                 )
+
                 fetches = exe.run(
-                    base.default_main_program(),
                     feed={
                         "input": self.input,
                         "prepend": self.prepend,
@@ -238,6 +242,7 @@ def set_args(self):
 
 
 class TestDiffOpFp16(TestDiffOp):
+    @test_with_pir_api
     def test_fp16_with_gpu(self):
         paddle.enable_static()
         if paddle.base.core.is_compiled_with_cuda():
@@ -258,7 +263,6 @@ def test_fp16_with_gpu(self):
                     append=self.append,
                 )
                 fetches = exe.run(
-                    paddle.static.default_main_program(),
                     feed={
                         "input": input,
                     },