diff --git a/src/test/java/com/google/devtools/build/lib/actions/ActionOutputDirectoryHelperTest.java b/src/test/java/com/google/devtools/build/lib/actions/ActionOutputDirectoryHelperTest.java
index 292d326ed52afa..8dd3cf57bb2b75 100644
--- a/src/test/java/com/google/devtools/build/lib/actions/ActionOutputDirectoryHelperTest.java
+++ b/src/test/java/com/google/devtools/build/lib/actions/ActionOutputDirectoryHelperTest.java
@@ -264,6 +264,14 @@ public boolean createDirectory(PathFragment path) throws IOException {
         return super.createDirectory(path);
       }
 
+      @Override
+      public boolean createWritableDirectory(PathFragment path) throws IOException {
+        if (path.equals(failingPath)) {
+          throw injectedException;
+        }
+        return super.createWritableDirectory(path);
+      }
+
       @Override
       public void createDirectoryAndParents(PathFragment path) throws IOException {
         if (path.equals(failingPath)) {