diff --git a/python/paddle/tensor/ops.py b/python/paddle/tensor/ops.py
index beea2e7d904250..b09daac5792355 100644
--- a/python/paddle/tensor/ops.py
+++ b/python/paddle/tensor/ops.py
@@ -242,7 +242,7 @@ def acos(x, name=None):
             Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
             [1.98231316, 1.77215421, 1.47062886, 1.26610363])
     """
-    if in_dynamic_mode():
+    if in_dynamic_or_pir_mode():
         return _C_ops.acos(x)
     else:
         check_variable_and_dtype(
diff --git a/test/legacy_test/test_activation_op.py b/test/legacy_test/test_activation_op.py
index 77db7a2d7a04bf..f1284fd30aaa80 100644
--- a/test/legacy_test/test_activation_op.py
+++ b/test/legacy_test/test_activation_op.py
@@ -2035,13 +2035,16 @@ def setUp(self):
     def init_shape(self):
         self.shape = [10, 12]
 
+    def test_check_output(self):
+        self.check_output(check_pir=True)
+
     def test_check_grad(self):
         if self.dtype == np.float16:
             return
-        self.check_grad(['X'], 'Out')
+        self.check_grad(['X'], 'Out', check_pir=True)
 
 
-class TestAcos_Comple64(TestAcos):
+class TestAcos_Complex64(TestAcos):
     def init_dtype(self):
         self.dtype = np.complex64
 
@@ -4709,7 +4712,7 @@ def test_check_grad(self):
 create_test_act_fp16_class(TestCos, check_pir=True)
 create_test_act_fp16_class(TestTan)
 create_test_act_fp16_class(TestCosh)
-create_test_act_fp16_class(TestAcos)
+create_test_act_fp16_class(TestAcos, check_pir=True)
 create_test_act_fp16_class(TestSin, check_pir=True)
 create_test_act_fp16_class(TestSinh)
 create_test_act_fp16_class(TestAsin)
@@ -4863,7 +4866,7 @@ def test_check_grad(self):
 create_test_act_bf16_class(TestCos, check_pir=True)
 create_test_act_bf16_class(TestTan)
 create_test_act_bf16_class(TestCosh)
-create_test_act_bf16_class(TestAcos)
+create_test_act_bf16_class(TestAcos, check_pir=True)
 create_test_act_bf16_class(TestSin, check_pir=True)
 create_test_act_bf16_class(TestSinh)
 create_test_act_bf16_class(TestAsin)