diff --git a/Slack.php b/Slack.php
index a428055..3f45e19 100644
--- a/Slack.php
+++ b/Slack.php
@@ -7,8 +7,6 @@
  * @license https://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
  */
 
-declare(strict_types=1);
-
 namespace Piwik\Plugins\Slack;
 
 use Piwik\Log\LoggerInterface;
diff --git a/tests/UI/expected-ui-screenshots/Slack_new_scheduled_reports.png b/tests/UI/expected-ui-screenshots/Slack_new_scheduled_reports.png
index 7ab9488..75e4d72 100644
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diff --git a/tests/UI/expected-ui-screenshots/Slack_send_via_slack.png b/tests/UI/expected-ui-screenshots/Slack_send_via_slack.png
index 5850725..f2432fb 100644
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diff --git a/tests/UI/expected-ui-screenshots/Slack_send_via_slack_new.png b/tests/UI/expected-ui-screenshots/Slack_send_via_slack_new.png
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diff --git a/tests/UI/expected-ui-screenshots/Slack_slack_report_disabled.png b/tests/UI/expected-ui-screenshots/Slack_slack_report_disabled.png
index b288af4..f2432fb 100644
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diff --git a/tests/UI/expected-ui-screenshots/Slack_slack_report_enabled.png b/tests/UI/expected-ui-screenshots/Slack_slack_report_enabled.png
index e7fb704..d6e3257 100644
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diff --git a/tests/UI/expected-ui-screenshots/Slack_slack_report_error.png b/tests/UI/expected-ui-screenshots/Slack_slack_report_error.png
index 695db7f..ddbacc7 100644
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diff --git a/tests/UI/expected-ui-screenshots/Slack_slack_report_pdf_save.png b/tests/UI/expected-ui-screenshots/Slack_slack_report_pdf_save.png
index 289c3e2..106ccfa 100644
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diff --git a/tests/UI/expected-ui-screenshots/Slack_slack_report_pdf_view.png b/tests/UI/expected-ui-screenshots/Slack_slack_report_pdf_view.png
index fba3217..824abb9 100644
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diff --git a/tests/UI/expected-ui-screenshots/Slack_slack_report_save_report.png b/tests/UI/expected-ui-screenshots/Slack_slack_report_save_report.png
index d1e745d..5a52a80 100644
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