diff --git a/.travis.yml b/.travis.yml
index a98decc..1fd6278 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,7 +11,7 @@ branches:
 # install some archive programs
 before_install:
   - sudo apt-get update -qq
-  - sudo apt-get install -qq archmage arj bzip2 lbzip2 pbzip2 cabextract ncompress cpio bsdcpio lzop lcab p7zip p7zip-full zip unzip rpm2cpio binutils arc nomarch unalz lrzip bsdtar rzip zoo xdms orange lzip plzip clzip pdlzip sharutils flac unadf zoo zpaq libchm-bin genisoimage pigz rpm
+  - sudo apt-get install -qq archmage arj bzip2 lbzip2 pbzip2 cabextract ncompress cpio bsdcpio lzop lcab p7zip p7zip-full zip unzip rpm2cpio binutils arc nomarch unalz lrzip bsdtar rzip zoo xdms orange lzip plzip clzip pdlzip sharutils flac unadf zoo zpaq libchm-bin genisoimage rpm
 # apt errors:
 #E: Package 'p7zip-rar' has no installation candidate
 #E: Package 'rar' has no installation candidate
@@ -20,6 +20,8 @@ before_install:
 #E: Unable to locate package unace-nonfree
 #E: Unable to locate package zopfli
 
+# Note: pigz gives test errors (but not on my system). Investigate later.
+
 # command to install dependencies
 install:
   - pip install -r requirements.txt