diff --git a/.travis.yml b/.travis.yml
index ab5152f2d..680d8147f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -46,7 +46,7 @@ install:
     - if [ "$FUNCTIONAL_TESTS" = true ]; then bin/dev -b; fi
 
 script:
-    - if [ "$PHPSTAN" = true ]; then composer require "phpstan/phpstan:0.7.0" ; php -d memory_limit=512M bin/phpstan analyse -l 1 -c phpstan.neon pkg/amqp-ext pkg/async-event-dispatcher pkg/dbal pkg/enqueue pkg/enqueue-bundle pkg/fs pkg/gearman pkg/job-queue pkg/null pkg/pheanstalk pkg/redis pkg/simple-client pkg/sqs pkg/stomp pkg/test pkg/rdkafka; fi
+    - if [ "$PHPSTAN" = true ]; then composer require "phpstan/phpstan:^0.8" ; php -d memory_limit=512M bin/phpstan analyse -l 1 -c phpstan.neon pkg/gps pkg/amqp-ext pkg/async-event-dispatcher pkg/dbal pkg/enqueue pkg/enqueue-bundle pkg/fs pkg/gearman pkg/job-queue pkg/null pkg/pheanstalk pkg/redis pkg/simple-client pkg/sqs pkg/stomp pkg/test pkg/rdkafka; fi
     - if [ "$PHP_CS_FIXER" = true ]; then IFS=$'\n'; COMMIT_SCA_FILES=($(git diff --name-only --diff-filter=ACMRTUXB "${TRAVIS_COMMIT_RANGE}")); unset IFS; fi
     - if [ "$PHP_CS_FIXER" = true ]; then ./bin/php-cs-fixer fix --config=.php_cs.dist -v --dry-run --stop-on-violation --using-cache=no --path-mode=intersection -- "${COMMIT_SCA_FILES[@]}"; fi
     - if [ "$UNIT_TESTS" = true ]; then bin/phpunit --exclude-group=functional; fi
diff --git a/pkg/gps/Tests/Client/GpsDriverTest.php b/pkg/gps/Tests/Client/GpsDriverTest.php
index da879cc26..e5c76300e 100644
--- a/pkg/gps/Tests/Client/GpsDriverTest.php
+++ b/pkg/gps/Tests/Client/GpsDriverTest.php
@@ -1,11 +1,12 @@
 <?php
 
-namespace Enqueue\Gps\Client;
+namespace Enqueue\Gps\Tests\Client;
 
 use Enqueue\Client\Config;
 use Enqueue\Client\DriverInterface;
 use Enqueue\Client\Message;
 use Enqueue\Client\Meta\QueueMetaRegistry;
+use Enqueue\Gps\Client\GpsDriver;
 use Enqueue\Gps\GpsContext;
 use Enqueue\Gps\GpsMessage;
 use Enqueue\Gps\GpsProducer;