diff --git a/.eslintignore b/.eslintignore
index a64673018..714d84019 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -9,6 +9,7 @@ sauce_connect.log*
 yarn-error.log
 node_modules
 /handlebars-release.tgz
+.nyc_output
 
 # Generated files
 lib/handlebars/compiler/parser.js
diff --git a/.gitignore b/.gitignore
index 8922abaf6..59019b37d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,6 +10,7 @@ sauce_connect.log*
 /yarn.lock
 node_modules
 /handlebars-release.tgz
+.nyc_output
 
 # Generated files
 lib/handlebars/compiler/parser.js
diff --git a/.prettierignore b/.prettierignore
index b6bc46217..724620669 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -9,6 +9,7 @@ sauce_connect.log*
 yarn-error.log
 node_modules
 /handlebars-release.tgz
+.nyc_output
 
 # Generated files
 lib/handlebars/compiler/parser.js