diff --git a/build.gradle.kts b/build.gradle.kts
index 7b6b717..f290ba7 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -110,6 +110,7 @@ tasks {
     }
     withType<Test> {
         useJUnitPlatform()
+        maxParallelForks = 1
     }
     named("compileJava").configure {
         dependsOn(swaggerSources.getByName("pmt").code)