diff --git a/src/main/java/com/google/devtools/build/lib/exec/StandaloneTestStrategy.java b/src/main/java/com/google/devtools/build/lib/exec/StandaloneTestStrategy.java
index 6cdf37cd8ddb13..5a51de852828bc 100644
--- a/src/main/java/com/google/devtools/build/lib/exec/StandaloneTestStrategy.java
+++ b/src/main/java/com/google/devtools/build/lib/exec/StandaloneTestStrategy.java
@@ -463,7 +463,7 @@ private static Spawn createCoveragePostProcessingSpawn(
         action.getLcovMergerRunfilesSupplier(),
         /* filesetMappings= */ ImmutableMap.of(),
         /* inputs= */ NestedSetBuilder.<ActionInput>compileOrder()
-            .addAll(action.getInputs().toList())
+            .addTransitive(action.getInputs())
             .addAll(expandedCoverageDir)
             .add(action.getCollectCoverageScript())
             .add(action.getCoverageDirectoryTreeArtifact())