diff --git a/tox.ini b/tox.ini
index 2cb4e06..7a7fa59 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,8 +19,13 @@ deps =
 skip_install = True
 
 [testenv:csslint]
-allowlist_externals = {toxinidir}/node_modules/csslint/dist/cli.js
-passenv = TRAVIS TRAVIS_JOB_ID TRAVIS_BRANCH
+allowlist_externals =
+    make
+    {toxinidir}/node_modules/csslint/dist/cli.js
+passenv =
+    TRAVIS
+    TRAVIS_JOB_ID
+    TRAVIS_BRANCH
 commands = 
     make requirements_js
     {toxinidir}/node_modules/csslint/dist/cli.js imagemodal/public/
@@ -28,8 +33,13 @@ deps =
 skip_install = True
 
 [testenv:eslint]
-allowlist_externals = {toxinidir}/node_modules/eslint/bin/eslint.js
-passenv = TRAVIS TRAVIS_JOB_ID TRAVIS_BRANCH
+allowlist_externals =
+    make
+    {toxinidir}/node_modules/eslint/bin/eslint.js
+passenv =
+    TRAVIS
+    TRAVIS_JOB_ID
+    TRAVIS_BRANCH
 commands = 
     make requirements_js
     {toxinidir}/node_modules/eslint/bin/eslint.js --fix imagemodal/public/view.js
@@ -37,7 +47,10 @@ deps =
 skip_install = True
 
 [testenv:quality]
-passenv = TRAVIS TRAVIS_JOB_ID TRAVIS_BRANCH
+passenv =
+    TRAVIS
+    TRAVIS_JOB_ID
+    TRAVIS_BRANCH
 deps = 
     -rrequirements/quality.txt
 commands =