diff --git a/contrib/seeds/generate-seeds.py b/contrib/seeds/generate-seeds.py
index 9ad488059b8..2dfad0c70e5 100755
--- a/contrib/seeds/generate-seeds.py
+++ b/contrib/seeds/generate-seeds.py
@@ -160,6 +160,9 @@ def main():
         sys.exit(1)
     g = sys.stdout
     indir = sys.argv[1]
+    g.write('// Copyright (c) The Bitcoin Core developers\n')
+    g.write('// Distributed under the MIT software license, see the accompanying\n')
+    g.write('// file COPYING or https://opensource.org/license/mit.\n\n')
     g.write('#ifndef BITCOIN_CHAINPARAMSSEEDS_H\n')
     g.write('#define BITCOIN_CHAINPARAMSSEEDS_H\n')
     g.write('/**\n')
diff --git a/src/test/caches_tests.cpp b/src/test/caches_tests.cpp
index 3086118fc7e..f444f1be239 100644
--- a/src/test/caches_tests.cpp
+++ b/src/test/caches_tests.cpp
@@ -1,3 +1,7 @@
+// Copyright (c) The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or https://opensource.org/license/mit.
+
 #include <node/caches.h>
 #include <util/byte_units.h>
 
diff --git a/src/test/kernel/block_data.h b/src/test/kernel/block_data.h
index 45a982c5f17..f4d693c0383 100644
--- a/src/test/kernel/block_data.h
+++ b/src/test/kernel/block_data.h
@@ -1,3 +1,7 @@
+// Copyright (c) The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or https://opensource.org/license/mit.
+
 #ifndef BITCOIN_TEST_KERNEL_BLOCK_DATA_H
 #define BITCOIN_TEST_KERNEL_BLOCK_DATA_H
 #include <array>