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-rwxr-xr-xtest/functional/feature_init.py9
1 files changed, 3 insertions, 6 deletions
diff --git a/test/functional/feature_init.py b/test/functional/feature_init.py
index 94f5116f9b..1b657e2c47 100755
--- a/test/functional/feature_init.py
+++ b/test/functional/feature_init.py
@@ -133,15 +133,12 @@ class InitStressTest(BitcoinTestFramework):
for target_file in target_files:
self.log.info(f"Perturbing file to ensure failure {target_file}")
- with open(target_file, "rb") as tf_read:
- contents = tf_read.read()
- tweaked_contents = bytearray(contents)
+ with open(target_file, "r+b") as tf:
# Since the genesis block is not checked by -checkblocks, the
# perturbation window must be chosen such that a higher block
# in blk*.dat is affected.
- tweaked_contents[150:350] = b'1' * 200
- with open(target_file, "wb") as tf_write:
- tf_write.write(bytes(tweaked_contents))
+ tf.seek(150)
+ tf.write(b'1' * 200)
start_expecting_error(err_fragment)