diff --git a/.scrutinizer.yml b/.scrutinizer.yml
index a211422..9cef7f5 100644
--- a/.scrutinizer.yml
+++ b/.scrutinizer.yml
@@ -20,7 +20,7 @@ build:
 
 tools:
     external_code_coverage:
-        timeout: 600
+        timeout: 900
 
 build_failure_conditions:
     - 'elements.rating(<= C).new.exists'                        # No new classes/methods with a rating of C or worse allowed
diff --git a/.travis.yml b/.travis.yml
index d27fa09..6065add 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,8 +9,10 @@ php:
 
 env:
   matrix:
-  - EXECUTOR=coroutine
+  - EXECUTOR= DEPENDENCIES=--prefer-lowest
+  - EXECUTOR=coroutine DEPENDENCIES=--prefer-lowest
   - EXECUTOR=
+  - EXECUTOR=coroutine
 
 
 cache:
@@ -31,9 +33,8 @@ jobs:
 
   include:
     - stage: Test
-      env: DEPENDENCIES=low
       install:
-        - travis_retry composer update --prefer-dist --prefer-lowest
+        - travis_retry composer update --prefer-dist {$DEPENDENCIES}
 
     - stage: Test
       env: COVERAGE
@@ -41,10 +42,12 @@ jobs:
         - mv ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/xdebug.ini{.disabled,}
         - if [[ ! $(php -m | grep -si xdebug) ]]; then echo "xdebug required for coverage"; exit 1; fi
       script:
-        - ./vendor/bin/phpunit --coverage-clover clover.xml
+        - ./vendor/bin/phpunit --coverage-php /tmp/coverage/clover_executor.cov
+        - EXECUTOR=coroutine ./vendor/bin/phpunit --coverage-php /tmp/coverage/clover_executor-coroutine.cov
       after_script:
-        - wget https://scrutinizer-ci.com/ocular.phar
-        - php ocular.phar code-coverage:upload --format=php-clover clover.xml
+        - ./vendor/bin/phpcov merge /tmp/coverage --clover /tmp/clover.xml
+        - wget https://github.com/scrutinizer-ci/ocular/releases/download/1.5.2/ocular.phar
+        - php ocular.phar code-coverage:upload --format=php-clover /tmp/clover.xml
 
     - stage: Code Quality
       php: 7.1
@@ -58,3 +61,4 @@ jobs:
       env: STATIC_ANALYSIS
       install: travis_retry composer install --prefer-dist
       script: composer static-analysis
+
diff --git a/composer.json b/composer.json
index 188e435..34f9d61 100644
--- a/composer.json
+++ b/composer.json
@@ -19,6 +19,7 @@
     "phpstan/phpstan": "0.10.5",
     "phpstan/phpstan-phpunit": "0.10.0",
     "phpstan/phpstan-strict-rules": "0.10.1",
+    "phpunit/phpcov": "^5.0",
     "phpunit/phpunit": "^7.2",
     "psr/http-message": "^1.0",
     "react/promise": "2.*"