diff --git a/ct/go/master_scripts/run_chromium_analysis_on_workers/main.go b/ct/go/master_scripts/run_chromium_analysis_on_workers/main.go
index fdb1345..bbf580a 100644
--- a/ct/go/master_scripts/run_chromium_analysis_on_workers/main.go
+++ b/ct/go/master_scripts/run_chromium_analysis_on_workers/main.go
@@ -220,6 +220,9 @@
 		return
 	}
 
+	// Clean up the chromium builds from Google storage after the run completes.
+	defer gs.DeleteRemoteDirLogErr(filepath.Join(util.CHROMIUM_BUILDS_DIR_NAME, chromiumBuild))
+
 	// Archive, trigger and collect swarming tasks.
 	isolateExtraArgs := map[string]string{
 		"CHROMIUM_BUILD":     chromiumBuild,
diff --git a/ct/go/master_scripts/run_chromium_perf_on_workers/main.go b/ct/go/master_scripts/run_chromium_perf_on_workers/main.go
index 94b9111..6fefb04 100644
--- a/ct/go/master_scripts/run_chromium_perf_on_workers/main.go
+++ b/ct/go/master_scripts/run_chromium_perf_on_workers/main.go
@@ -244,6 +244,10 @@
 		return
 	}
 
+	// Clean up the chromium builds from Google storage after the run completes.
+	defer gs.DeleteRemoteDirLogErr(filepath.Join(util.CHROMIUM_BUILDS_DIR_NAME, chromiumBuildNoPatch))
+	defer gs.DeleteRemoteDirLogErr(filepath.Join(util.CHROMIUM_BUILDS_DIR_NAME, chromiumBuildWithPatch))
+
 	// Archive, trigger and collect swarming tasks.
 	isolateExtraArgs := map[string]string{
 		"CHROMIUM_BUILD_NOPATCH":       chromiumBuildNoPatch,