diff --git a/cocotbext/eth/gmii.py b/cocotbext/eth/gmii.py
index c2b330c..c922255 100644
--- a/cocotbext/eth/gmii.py
+++ b/cocotbext/eth/gmii.py
@@ -100,9 +100,9 @@ class GmiiFrame:
 
     def __repr__(self):
         return (
-            f"{type(self).__name__}(data={repr(self.data)}, "
-            f"error={repr(self.error)}, "
-            f"rx_sim_time={repr(self.rx_sim_time)})"
+            f"{type(self).__name__}(data={self.data!r}, "
+            f"error={self.error!r}, "
+            f"rx_sim_time={self.rx_sim_time!r})"
         )
 
     def __len__(self):
diff --git a/cocotbext/eth/xgmii.py b/cocotbext/eth/xgmii.py
index 0ee01e8..77f88ad 100644
--- a/cocotbext/eth/xgmii.py
+++ b/cocotbext/eth/xgmii.py
@@ -102,10 +102,10 @@ class XgmiiFrame:
 
     def __repr__(self):
         return (
-            f"{type(self).__name__}(data={repr(self.data)}, "
-            f"ctrl={repr(self.ctrl)}, "
-            f"rx_sim_time={repr(self.rx_sim_time)}, "
-            f"rx_start_lane={repr(self.rx_start_lane)})"
+            f"{type(self).__name__}(data={self.data!r}, "
+            f"ctrl={self.ctrl!r}, "
+            f"rx_sim_time={self.rx_sim_time!r}, "
+            f"rx_start_lane={self.rx_start_lane!r})"
         )
 
     def __len__(self):