diff --git a/test/functional/invalidateblock.py b/test/functional/invalidateblock.py
--- a/test/functional/invalidateblock.py
+++ b/test/functional/invalidateblock.py
@@ -10,11 +10,18 @@
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import *
 
+# Defer magnetic anomaly until far in the future, so this test can operate
+# normally
+# TODO: T483
+MAGNETIC_ANOMALY_START_TIME = 2000000000
+
 
 class InvalidateTest(BitcoinTestFramework):
     def set_test_params(self):
         self.setup_clean_chain = True
         self.num_nodes = 3
+        self.extra_args = [['-magneticanomalyactivationtime=%d' % MAGNETIC_ANOMALY_START_TIME], ['-magneticanomalyactivationtime=%d' %
+                                                                                                 MAGNETIC_ANOMALY_START_TIME], ['-magneticanomalyactivationtime=%d' % MAGNETIC_ANOMALY_START_TIME]]
 
     def setup_network(self):
         self.setup_nodes()