diff --git a/test_runner/src/main/kotlin/ftl/args/CommonArgs.kt b/test_runner/src/main/kotlin/ftl/args/CommonArgs.kt
index 6367da84a1..307f1437f4 100644
--- a/test_runner/src/main/kotlin/ftl/args/CommonArgs.kt
+++ b/test_runner/src/main/kotlin/ftl/args/CommonArgs.kt
@@ -6,6 +6,7 @@ import ftl.reports.output.OutputReportType
 import ftl.run.status.OutputStyle
 
 data class CommonArgs(
+    @Transient // we don't want to have this field saved in outputReport.json
     override val data: String,
 
     // Gcloud