diff --git a/.bzrignore b/.bzrignore
index 376f00f590c..e893a7dfcfc 100644
--- a/.bzrignore
+++ b/.bzrignore
@@ -37,3 +37,6 @@ Lib/test/data/*
 Lib/lib2to3/Grammar*.pickle
 Lib/lib2to3/PatternGrammar*.pickle
 __pycache__
+.coverage
+coverage/*
+htmlcov/*
diff --git a/.gitignore b/.gitignore
index ad3d0e790b9..63f4314e054 100644
--- a/.gitignore
+++ b/.gitignore
@@ -42,3 +42,6 @@ pyconfig.h
 python
 python-gdb.py
 tags
+.coverage
+coverage/
+htmlcov/
diff --git a/.hgignore b/.hgignore
index 7bb2457d11b..6a2615b94b2 100644
--- a/.hgignore
+++ b/.hgignore
@@ -70,3 +70,6 @@ PCbuild/Win32-temp-*
 PCbuild/x64-temp-*
 __pycache__
 Modules/_testembed
+.coverage
+coverage/
+htmlcov/