diff --git a/newsfragments/757.bugfix.rst b/newsfragments/757.bugfix.rst
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+++ b/newsfragments/757.bugfix.rst
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+fixed malformed PeerId in test_peerinfo
diff --git a/newsfragments/757.internal.rst b/newsfragments/757.internal.rst
new file mode 100644
index 00000000..5745168f
--- /dev/null
+++ b/newsfragments/757.internal.rst
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+fixed a typecheck error using cast in peerinfo.py