diff --git a/tests/script.sh b/tests/script.sh
index 1b49763..d625f5a 100755
--- a/tests/script.sh
+++ b/tests/script.sh
@@ -1,24 +1,26 @@
 # Check syntax in php files.
 find . -type "f" -iname "*.php" ! -path "*/vendor/*" -exec php -l {} \;
 
+errors=0
+
 # Run tests.
 phpunit --configuration tests/phpunit.xml
 if [[ "${?}" -ne 0 ]]; then
-    exit 1
+    ((errors++))
 fi
 
 # Enforce line ending consistency in php files.
 crlf_file=$(find . -type "f" -iname "*.php" ! -path "*/vendor/*" -exec grep --files-with-matches $'\r' {} \;)
 if [[ ! -z "${crlf_file}" ]]; then
     echo "${crlf_file}" | perl -pe 's/(.*)/CRLF line terminators found in \1/'
-    exit 1
+    ((errors++))
 fi
 
 # Enforce indentation character consistency in php files.
 tab_char=$(find . -type "f" -iname "*.php" ! -path "*/vendor/*" -exec grep --line-number -H --perl-regexp "\t" {} \;)
 if [[ ! -z "${tab_char}" ]]; then
     echo -e "${tab_char}" | perl -pe 's/^(.*)$/Tab character found in \1/'
-    exit 1
+    ((errors++))
 fi
 
 # Enforce indentation consistency in php files.
@@ -53,7 +55,7 @@ if [[ "${TRAVIS_PHP_VERSION}" != "hhvm" ]]; then
     invalid_indentation=$(find . -type "f" -iname "*.php" ! -path "*/vendor/*" -exec bash -c 'find_invalid_indentation "{}"' \;)
     if [[ ! -z "${invalid_indentation}" ]]; then
         echo "${invalid_indentation}"
-        exit 1
+        ((errors++))
     fi
 fi
 
@@ -61,33 +63,39 @@ fi
 trailing_whitespace=$(find . -type "f" -iname "*.php" ! -path "*/vendor/*" -exec egrep --line-number -H " +$" {} \;)
 if [[ ! -z "${trailing_whitespace}" ]]; then
     echo -e "${trailing_whitespace}" | perl -pe 's/^(.*)$/Trailing whitespace found in \1/'
-    exit 1
+    ((errors++))
 fi
 
 # Prohibit long lines in php files.
 long_lines=$(find . -type "f" -iname "*.php" ! -path "*/vendor/*" -exec awk '{print FILENAME":"NR" "length}' {} \; | awk '$2 > 120')
 if [[ ! -z "${long_lines}" ]]; then
     echo -e "${long_lines}" | perl -pe 's/^(.*)$/Long lines found in \1/'
-    exit 1
+    ((errors++))
 fi
 
 # Prohibit @author in php files.
 at_author=$(find . -type "f" -iname "*.php" ! -path "*/vendor/*" -exec egrep --line-number -H "@author" {} \;)
 if [[ ! -z "${at_author}" ]]; then
     echo -e "${at_author}" | perl -pe 's/^(.*)$/\@author found in \1/'
-    exit 1
+    ((errors++))
 fi
 
 # Prohibit screaming caps notation in php files.
 caps=$(find . -type "f" -iname "*.php" ! -path "*/vendor/*" -exec egrep --color=always --line-number -H -e "FALSE[^']" -e "NULL" -e "TRUE" {} \;)
 if [[ ! -z "${caps}" ]]; then
     echo -e "${caps}" | perl -pe 's/^(.*)$/All caps found in \1/'
-    exit 1
+    ((errors++))
 fi
 
 # Require identical comparison operators (===, not ==) in php files.
 equal=$(find . -type "f" -iname "*.php" ! -path "*/vendor/*" -exec egrep --color=always --line-number -H "[^!=]==[^=]" {} \;)
 if [[ ! -z "${equal}" ]]; then
     echo -e "${equal}" | perl -pe 's/^(.*)$/Non-identical comparison operator found in \1/'
+    ((errors++))
+fi
+
+if [ $errors -eq 0 ]; then
+    exit 0
+else
     exit 1
 fi