diff --git a/tests/.ci/.phpqa.yml b/tests/.ci/.phpqa.yml
index 8d948b55..1d338a88 100644
--- a/tests/.ci/.phpqa.yml
+++ b/tests/.ci/.phpqa.yml
@@ -10,6 +10,7 @@ phpqa:
         # Fatal error: Uncaught UnexpectedValueException: RecursiveDirectoryIterator::__construct(/home/travis/build/EdgedesignCZ/phpqa/phpqa/):
         # failed to open dir: No such file or directory
         # https://travis-ci.org/EdgedesignCZ/phpqa/jobs/558458320#L799
+    ignoredFiles: tests/.phpunit/fix-psalm-testcase.php
     tools:
         - phpmetrics:0
         - phploc
diff --git a/tests/.phpunit/fix-psalm-testcase.php b/tests/.phpunit/fix-psalm-testcase.php
new file mode 100644
index 00000000..77e41809
--- /dev/null
+++ b/tests/.phpunit/fix-psalm-testcase.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace
+{
+    use PHPUnit\Framework\TestCase;
+
+    abstract class PHPUnit_Framework_TestCase extends TestCase
+    {
+    }
+}
diff --git a/tests/.phpunit/fix-testcase.php b/tests/.phpunit/fix-testcase.php
index 8ffad3fb..0110ede5 100644
--- a/tests/.phpunit/fix-testcase.php
+++ b/tests/.phpunit/fix-testcase.php
@@ -2,5 +2,9 @@
 
 $legacyTestClass = 'PHPUnit_Framework_TestCase';
 if (!class_exists($legacyTestClass)) {
-    class_alias('PHPUnit\Framework\TestCase', $legacyTestClass);
+    // `class_alias('PHPUnit\Framework\TestCase', $legacyTestClass);` does not work for psalm:
+    // > Could not get class storage for phpunit_framework_testcase"
+    // > https://github.com/EdgedesignCZ/phpqa/runs/2581795905?check_suite_focus=true#step:7:246
+    // > https://github.com/psalm/psalm-plugin-phpunit/issues/30#issuecomment-485485187
+    include_once(__DIR__ . "/fix-psalm-testcase.php");
 }