diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
index c5039f58b5..fbd35fd2c2 100644
--- a/.git-blame-ignore-revs
+++ b/.git-blame-ignore-revs
@@ -1,3 +1,9 @@
+# all: Update Python formatting to latest Black version 22.1.0.
+ab2923dfa1174dc177f0a90cb00a7e4ff87958d2
+
+# all: Update Python formatting to latest Black version 21.12b0.
+3770fab33449a5dadf8eb06edfae0767e75320a6
+
 # tools/gen-cpydiff.py: Fix formatting of doc strings for new Black.
 0f78c36c5aa458a954eed39a46942209107a553e