diff --git a/robolectric-extension/build.gradle b/robolectric-extension/build.gradle
index 817d421..4f48e93 100644
--- a/robolectric-extension/build.gradle
+++ b/robolectric-extension/build.gradle
@@ -32,7 +32,7 @@ test {
         showStackTraces = true
     }
     systemProperty 'junit.jupiter.execution.parallel.enabled', 'true'
-    systemProperty 'junit.jupiter.execution.parallel.mode.default ', 'concurrent'
+    systemProperty 'junit.jupiter.execution.parallel.mode.default', 'same_thread'
     systemProperty 'junit.jupiter.execution.parallel.mode.classes.default', 'same_thread'
     systemProperty 'java.util.logging.config.file',
         "${projectDir}/src/test/resources/logging.properties"