diff --git a/.gitignore b/.gitignore
index 1eff1dc6..d520ea5a 100755
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,4 @@ doc
 .yardoc
 tmp
 Makefile
+.mm-pid-*
diff --git a/middleman-core/fixtures/alt-path-app/.mm-pid-4567 b/middleman-core/fixtures/alt-path-app/.mm-pid-4567
deleted file mode 100644
index 2aa950e4..00000000
--- a/middleman-core/fixtures/alt-path-app/.mm-pid-4567
+++ /dev/null
@@ -1 +0,0 @@
-12945
\ No newline at end of file