diff --git a/History.md b/History.md
index a8853ef3b4..0b550d892f 100644
--- a/History.md
+++ b/History.md
@@ -33,6 +33,11 @@
 
 * The `reify` npm package has been upgraded to version 0.11.22.
 
+* Illegal characters in paths written in build output directories will now
+  be replaced with `_`s rather than removed, so that file and directory
+  names consisting of only illegal characters do not become empty
+  strings. [PR #8765](https://github.com/meteor/meteor/pull/8765).
+
 ## v1.5, 2017-05-30
 
 * The `meteor-base` package implies a new `dynamic-import` package, which
diff --git a/tools/tests/assets.js b/tools/tests/assets.js
index 60e37ca519..7774e52fb1 100644
--- a/tools/tests/assets.js
+++ b/tools/tests/assets.js
@@ -23,9 +23,9 @@ selftest.define("assets - unicode asset names are allowed", () => {
   run.match('1 - getText: Hello world!');
   run.match('2 - getText: Hello world!');
   run.match('3 - getText: Hello world!');
-  run.match(/1 - absoluteFilePath:(.*)maaverde.txt/);
-  run.match(/2 - absoluteFilePath:(.*)maaverde.txt/);
-  run.match(/3 - absoluteFilePath:(.*)maaverde.txt/);
+  run.match(/1 - absoluteFilePath:(.*)ma_a_verde.txt/);
+  run.match(/2 - absoluteFilePath:(.*)ma_a_verde.txt/);
+  run.match(/3 - absoluteFilePath:(.*)ma_a_verde.txt/);
   run.stop();
 });