diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
index b3fe9f76a6..31645e2fa5 100644
--- a/.git-blame-ignore-revs
+++ b/.git-blame-ignore-revs
@@ -9,3 +9,5 @@ b88e1cd1b28e3609684c79a2ec0e88f26cfc362b
 7dacad70e74e2ec97f6492d4e7a3cb5dd498bcd7
 b771971e3299c4fa56534b93421f7a2b9c7282fd
 9de88bb57ea9855da408cbec1dc8acb9079eda47
+# Ran SystemTests and python/ctsm through black python formatter
+5364ad66eaceb55dde2d3d598fe4ce37ac83a93c