diff --git a/toolkit/modules/Log.jsm b/toolkit/modules/Log.jsm
index a38a941bf323..59b122d768d2 100644
--- a/toolkit/modules/Log.jsm
+++ b/toolkit/modules/Log.jsm
@@ -893,14 +893,9 @@ FileAppender.prototype = {
   _getFile: function() {
     if (!this._fileReadyPromise) {
       this._fileReadyPromise = this._openFile();
-      return this._fileReadyPromise;
     }
 
-    return this._fileReadyPromise.then(_ => {
-      if (!this._file) {
-        return this._openFile();
-      }
-    });
+    return this._fileReadyPromise;
   },
 
   doAppend: function (formatted) {
diff --git a/toolkit/modules/tests/xpcshell/test_Log.js b/toolkit/modules/tests/xpcshell/test_Log.js
index 93ac2d8db924..4ea90e2ddfab 100644
--- a/toolkit/modules/tests/xpcshell/test_Log.js
+++ b/toolkit/modules/tests/xpcshell/test_Log.js
@@ -288,6 +288,11 @@ add_task(function test_FileAppender() {
 
 add_task(function test_BoundedFileAppender() {
   let dir = OS.Path.join(do_get_profile().path, "test_Log");
+
+  if (!(yield OS.File.exists(dir))) {
+    yield OS.File.makeDir(dir);
+  }
+
   let path = OS.Path.join(dir, "test_BoundedFileAppender");
   // This appender will hold about two lines at a time.
   let appender = new Log.BoundedFileAppender(path, testFormatter, 40);