diff --git a/qiskit/test/mock/fake_backend.py b/qiskit/test/mock/fake_backend.py
index 1be914be0dda..6d152b899cdc 100644
--- a/qiskit/test/mock/fake_backend.py
+++ b/qiskit/test/mock/fake_backend.py
@@ -174,7 +174,12 @@ def dtm(self) -> float:
         Returns:
             dtm: The output signal timestep in seconds.
         """
-        return self._conf_dict.get("dtm")
+        dtm = self._conf_dict.get("dtm")
+        if dtm is not None:
+            # converting `dtm` in nanoseconds in configuration file to seconds
+            return dtm * 1e-9
+        else:
+            return None
 
     @property
     def meas_map(self) -> List[List[int]]:
diff --git a/releasenotes/notes/fix-fake-backend-v2-dtm-unit-392a8fe3fcc9b793.yaml b/releasenotes/notes/fix-fake-backend-v2-dtm-unit-392a8fe3fcc9b793.yaml
new file mode 100644
index 000000000000..bf01ff7fec13
--- /dev/null
+++ b/releasenotes/notes/fix-fake-backend-v2-dtm-unit-392a8fe3fcc9b793.yaml
@@ -0,0 +1,8 @@
+---
+fixes:
+  |
+  Fixed an issue with :class:`~.BackendV2` based fake backend classes from the
+  ``qiskit.providers.fake_provider`` module such as ``FakeMontrealV2`` where the
+  value for the :attr:`~.BackendV2.dtm` attribute were not properly being
+  converted to seconds. This would cause issues when using these fake backends
+  with scheduling.
diff --git a/test/python/providers/test_fake_backends.py b/test/python/providers/test_fake_backends.py
index 2e99feb0033d..da7b6ebd6127 100644
--- a/test/python/providers/test_fake_backends.py
+++ b/test/python/providers/test_fake_backends.py
@@ -110,6 +110,11 @@ def test_convert_to_target(self, backend):
         if target.dt is not None:
             self.assertLess(target.dt, 1e-6)
 
+    @data(*FAKE_PROVIDER_FOR_BACKEND_V2.backends())
+    def test_backend_v2_dtm(self, backend):
+        if backend.dtm:
+            self.assertLess(backend.dtm, 1e-6)
+
     @data(*FAKE_PROVIDER.backends())
     def test_to_dict_configuration(self, backend):
         configuration = backend.configuration()