diff --git a/.travis.yml b/.travis.yml
index ca4c1d5..44422f2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,14 +3,20 @@ language: php
 php:
   - 7.3
   - 7.4
+  - 8.0
+
+env:
+  global:
+    - COMPOSER_MEMORY_LIMIT=-1
+    - XDEBUG_MODE=coverage
 
 cache:
   directories:
     - $HOME/.composer/cache
 
 install:
-  - COMPOSER_MEMORY_LIMIT=-1 travis_retry composer install --no-interaction --prefer-dist
-  - COMPOSER_MEMORY_LIMIT=-1 travis_retry composer require --no-interaction --prefer-dist --dev php-coveralls/php-coveralls
+  - travis_retry composer install --no-interaction --prefer-dist
+  - travis_retry composer require --no-interaction --prefer-dist --dev php-coveralls/php-coveralls
 
 script: vendor/bin/phpunit --verbose --coverage-clover build/logs/clover.xml
 
diff --git a/composer.json b/composer.json
index 008f1da..69d1d5c 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
         "email": "dmitry.g.ivanov@gmail.com"
     }],
     "require": {
-        "php": "^7.3",
+        "php": "^7.3|^8.0",
         "ext-dom": "*",
         "ext-json": "*",
         "ext-simplexml": "*",
diff --git a/tests/debug/BacktraceAsStringTest/backtrace.txt b/tests/debug/BacktraceAsStringTest/backtrace.txt
index 27e3bc9..9c8ca0c 100644
--- a/tests/debug/BacktraceAsStringTest/backtrace.txt
+++ b/tests/debug/BacktraceAsStringTest/backtrace.txt
@@ -1,4 +1,4 @@
-#0  backtrace_as_string() called at [/Applications/MAMP/htdocs/illuminated/helper-functions/tests/debug/BacktraceAsStringTest.php:47]
-#1  Illuminated\Helpers\Tests\Debug\BacktraceAsStringTest->anotherExtraMethod() called at [/Applications/MAMP/htdocs/illuminated/helper-functions/tests/debug/BacktraceAsStringTest.php:37]
-#2  Illuminated\Helpers\Tests\Debug\BacktraceAsStringTest->getBacktrace() called at [/Applications/MAMP/htdocs/illuminated/helper-functions/tests/debug/BacktraceAsStringTest.php:13]
+#0  backtrace_as_string() called at [/Users/maind/Code/illuminated/helper-functions/tests/debug/BacktraceAsStringTest.php:47]
+#1  Illuminated\Helpers\Tests\Debug\BacktraceAsStringTest->anotherExtraMethod() called at [/Users/maind/Code/illuminated/helper-functions/tests/debug/BacktraceAsStringTest.php:37]
+#2  Illuminated\Helpers\Tests\Debug\BacktraceAsStringTest->getBacktrace() called at [/Users/maind/Code/illuminated/helper-functions/tests/debug/BacktraceAsStringTest.php:13]
 #3  Illuminated\Helpers\Tests\Debug\BacktraceAsStringTest->it_returns_backtrace_as_string_without_args()
\ No newline at end of file
diff --git a/tests/debug/MinimizedBacktraceAsStringTest/backtrace.txt b/tests/debug/MinimizedBacktraceAsStringTest/backtrace.txt
index 719f2ec..9be7e5e 100644
--- a/tests/debug/MinimizedBacktraceAsStringTest/backtrace.txt
+++ b/tests/debug/MinimizedBacktraceAsStringTest/backtrace.txt
@@ -1,4 +1,4 @@
-#0 /Applications/MAMP/htdocs/illuminated/helper-functions/src/debug.php:27
-#1 /Applications/MAMP/htdocs/illuminated/helper-functions/tests/debug/MinimizedBacktraceAsStringTest.php:47
-#2 /Applications/MAMP/htdocs/illuminated/helper-functions/tests/debug/MinimizedBacktraceAsStringTest.php:37
-#3 /Applications/MAMP/htdocs/illuminated/helper-functions/tests/debug/MinimizedBacktraceAsStringTest.php:13
\ No newline at end of file
+#0 /Users/maind/Code/illuminated/helper-functions/src/debug.php:27
+#1 /Users/maind/Code/illuminated/helper-functions/tests/debug/MinimizedBacktraceAsStringTest.php:47
+#2 /Users/maind/Code/illuminated/helper-functions/tests/debug/MinimizedBacktraceAsStringTest.php:37
+#3 /Users/maind/Code/illuminated/helper-functions/tests/debug/MinimizedBacktraceAsStringTest.php:13
\ No newline at end of file