Experiment

.travis.yml

@@ -17,7 +17,7 @@ before_script:
   - composer install --ignore-platform-reqs
 
 script:
-  - ./vendor/bin/phpunit
+  - ./vendor/bin/phpunit --color=always --coverage-text
 
 jobs:
   include:

composer.json

@@ -28,7 +28,7 @@
     "scripts": {
         "check": [
             "php-cs-fixer fix --ansi --dry-run --diff",
-            "phpcs --report-width=200 samples/ src/ tests/ --ignore=samples/Header.php --standard=PSR2 -n",
+            "phpcs --report-width=200 samples/ src/ tests/ --ignore=samples/Header.php --standard=PSR12 -n",
             "phpunit --color=always"
         ],
         "fix": [

tests/data/Calculation/Statistical/CHIDIST.php

@@ -37,4 +37,8 @@ return [
         '#VALUE!',
         'NAN', 3,
     ],
+    [
+        '#NUM!',
+        -8, 3,
+    ],
 ];