diff --git a/hathor/conf/testnet.py b/hathor/conf/testnet.py
index c956c48c5..4743e9f4e 100644
--- a/hathor/conf/testnet.py
+++ b/hathor/conf/testnet.py
@@ -68,6 +68,20 @@
                 lock_in_on_timeout=False,
                 version='0.59.0',
                 signal_support_by_default=True,
+            ),
+
+            # NOP feature to test Feature Activation for Transactions
+            Feature.NOP_FEATURE_1: Criteria(
+                bit=0,
+                # N = 4_354_560
+                # Expected to be reached around Sunday, 2024-11-17.
+                # Right now the best block is 4_326_600 on testnet (2024-11-07).
+                start_height=4_354_560,  # N
+                timeout_height=4_394_880,  # N + 2 * 20160 (2 weeks after the start)
+                minimum_activation_height=0,
+                lock_in_on_timeout=False,
+                version='0.63.0',
+                signal_support_by_default=True,
             )
         }
     )
diff --git a/hathor/conf/testnet.yml b/hathor/conf/testnet.yml
index 554df5247..8babd1f32 100644
--- a/hathor/conf/testnet.yml
+++ b/hathor/conf/testnet.yml
@@ -50,3 +50,16 @@ FEATURE_ACTIVATION:
       lock_in_on_timeout: false
       version: 0.59.0
       signal_support_by_default: true
+
+    # NOP feature to test Feature Activation for Transactions
+    NOP_FEATURE_1:
+      bit: 0
+      # N = 4_354_560
+      # Expected to be reached around Sunday, 2024-11-17.
+      # Right now the best block is 4_326_600 on testnet (2024-11-07).
+      start_height: 4_354_560  # N
+      timeout_height: 4_394_880  # N + 2 * 20160 (2 weeks after the start)
+      minimum_activation_height: 0
+      lock_in_on_timeout: false
+      version: 0.63.0
+      signal_support_by_default: true