diff --git a/.travis.yml b/.travis.yml
index 1dea0de..2a55914 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,25 +1,21 @@
 language: python
-dist: xenial  # for python3.7+ testing
+dist: bionic
+
+cache: pip
 
 python:
 - 3.6
 - 3.7
-- 3.8-dev
 
 install:
 # numpy requires some additional dependencies
 - sudo apt-get update
 - sudo apt-get install libblas-dev liblapack-dev libatlas-base-dev gfortran libhdf5-dev
 - pip install -r test/requirements-dev.txt
-- find . -name "requirements.txt" -exec pip install -r "{}" \;
-
-before_script:
-# To ignore a directory, we can just delete the directory
-# so that treon doesn't see it.
-- xargs -t rm -rf < test/ignore
+- find . -name "requirements.txt" | tr '\n' '\0' | xargs -0 -n1 pip install -r
 
 script:
 # Test that notebooks run successfully
-- find "$PWD" -name "*.ipynb" -exec sh test/test_notebook.sh "{}" +
+- eval "treon $(awk '{printf " --exclude " $0}' test/ignore)"
 # Naive test to check that output committed with notebook-
-- find . -name "*.ipynb" -exec sh test/test_output.sh "{}" \;
+- find . -name "*.ipynb" | tr '\n' '\0' | xargs -0 -n1 sh test/test_output.sh
diff --git a/test/README.md b/test/README.md
index 7ba95f0..bb87694 100644
--- a/test/README.md
+++ b/test/README.md
@@ -12,7 +12,7 @@ on Travis.
 
 The tests also check if output is committed with the notebook (which it should be).
 This test is naive - it tests if the number of code cells in a notebook is equal to
-the number of cell outputs in the same notebook.
+the number of cell outputs in the same notebook. (See `.travis.yml`.)
 
 ## Structure
 
diff --git a/test/requirements-dev.txt b/test/requirements-dev.txt
index 9a89992..3ef49ac 100644
--- a/test/requirements-dev.txt
+++ b/test/requirements-dev.txt
@@ -1,2 +1,2 @@
 -r requirements.txt
-treon==0.1.2
+treon==0.1.3
diff --git a/test/test_notebook.sh b/test/test_notebook.sh
deleted file mode 100644
index 8c90d66..0000000
--- a/test/test_notebook.sh
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/bin/sh
-# test/test_output.sh path_to_notebook
-# See ReviewNB/treon#12 
-DIRECTORY=$(dirname "$1")
-cd "$DIRECTORY"
-treon
diff --git a/test/test_output.sh b/test/test_output.sh
index 304deb4..9f51f0a 100644
--- a/test/test_output.sh
+++ b/test/test_output.sh
@@ -1,7 +1,4 @@
 #!/bin/sh
 # test/test_output.sh 
-test $(grep -oc '"outputs": ' "$1") -eq $(grep -oc '"cell_type": "code"' "$1")
-if [ $? -gt 0 ]; then
-    echo "FAIL: Was output committed with this notebook? $1"
-fi
-exit 0
+echo $1
+test $(grep -oc '"outputs": ' "$1") -eq $(grep -oc '"cell_type": "code"' "$1") || exit 1
\ No newline at end of file