diff --git a/qiskit_aer/backends/aerbackend.py b/qiskit_aer/backends/aerbackend.py
index 9a0b5bd1dd..bffc8af192 100644
--- a/qiskit_aer/backends/aerbackend.py
+++ b/qiskit_aer/backends/aerbackend.py
@@ -344,7 +344,10 @@ def defaults(self):
 
     @property
     def max_circuits(self):
-        return self.configuration().max_experiments
+        if hasattr(self.configuration(), "max_experiments"):
+            return self.configuration().max_experiments
+        else:
+            return None
 
     @property
     def target(self):
diff --git a/qiskit_aer/backends/statevector_simulator.py b/qiskit_aer/backends/statevector_simulator.py
index 18985a05b9..5c74e0d535 100644
--- a/qiskit_aer/backends/statevector_simulator.py
+++ b/qiskit_aer/backends/statevector_simulator.py
@@ -355,7 +355,7 @@ def _validate(self, qobj):
         1. Set shots=1.
         2. Check number of qubits will fit in local memory.
         """
-        name = self.name()
+        name = self.name
         if getattr(qobj.config, "noise_model", None) is not None:
             raise AerError(f"{name} does not support noise.")
 
diff --git a/qiskit_aer/backends/unitary_simulator.py b/qiskit_aer/backends/unitary_simulator.py
index 20b94804ad..f2039486ce 100644
--- a/qiskit_aer/backends/unitary_simulator.py
+++ b/qiskit_aer/backends/unitary_simulator.py
@@ -342,7 +342,7 @@ def _validate(self, qobj):
         2. No measurements or reset
         3. Check number of qubits will fit in local memory.
         """
-        name = self.name()
+        name = self.name
         if getattr(qobj.config, "noise_model", None) is not None:
             raise AerError(f"{name} does not support noise.")