diff --git a/tests/robustness/validate/patch_history.go b/tests/robustness/validate/patch_history.go
index aebb0ebf220..259240feebb 100644
--- a/tests/robustness/validate/patch_history.go
+++ b/tests/robustness/validate/patch_history.go
@@ -16,12 +16,38 @@ package validate
 
 import (
 	"github.com/anishathalye/porcupine"
-
 	"go.etcd.io/etcd/tests/v3/robustness/model"
 	"go.etcd.io/etcd/tests/v3/robustness/traffic"
 )
 
+func patchedOperationHistory(reports []traffic.ClientReport) []porcupine.Operation {
+	allOperations := operations(reports)
+	uniqueEvents := uniqueWatchEvents(reports)
+	return patchOperationsWithWatchEvents(allOperations, uniqueEvents)
+}
+
+func operations(reports []traffic.ClientReport) []porcupine.Operation {
+	var ops []porcupine.Operation
+	for _, r := range reports {
+		ops = append(ops, r.OperationHistory.Operations()...)
+	}
+	return ops
+}
+
+func uniqueWatchEvents(reports []traffic.ClientReport) map[model.Event]traffic.TimedWatchEvent {
+	persisted := map[model.Event]traffic.TimedWatchEvent{}
+	for _, r := range reports {
+		for _, resp := range r.Watch {
+			for _, event := range resp.Events {
+				persisted[event.Event] = traffic.TimedWatchEvent{Time: resp.Time, WatchEvent: event}
+			}
+		}
+	}
+	return persisted
+}
+
 func patchOperationsWithWatchEvents(operations []porcupine.Operation, watchEvents map[model.Event]traffic.TimedWatchEvent) []porcupine.Operation {
+
 	newOperations := make([]porcupine.Operation, 0, len(operations))
 	lastObservedOperation := lastOperationObservedInWatch(operations, watchEvents)
 
diff --git a/tests/robustness/validate/validate.go b/tests/robustness/validate/validate.go
index 612e5a116c5..0364fd340ac 100644
--- a/tests/robustness/validate/validate.go
+++ b/tests/robustness/validate/validate.go
@@ -17,42 +17,18 @@ package validate
 import (
 	"testing"
 
-	"github.com/anishathalye/porcupine"
 	"go.uber.org/zap"
 
-	"go.etcd.io/etcd/tests/v3/robustness/model"
 	"go.etcd.io/etcd/tests/v3/robustness/traffic"
 )
 
 // ValidateAndReturnVisualize returns visualize as porcupine.linearizationInfo used to generate visualization is private.
 func ValidateAndReturnVisualize(t *testing.T, lg *zap.Logger, cfg Config, reports []traffic.ClientReport) (visualize func(basepath string) error) {
 	eventHistory := validateWatch(t, cfg, reports)
-	allOperations := operations(reports)
-	watchEvents := uniqueWatchEvents(reports)
-	patchedOperations := patchOperationsWithWatchEvents(allOperations, watchEvents)
+	patchedOperations := patchedOperationHistory(reports)
 	return validateOperationsAndVisualize(t, lg, patchedOperations, eventHistory)
 }
 
-func operations(reports []traffic.ClientReport) []porcupine.Operation {
-	var ops []porcupine.Operation
-	for _, r := range reports {
-		ops = append(ops, r.OperationHistory.Operations()...)
-	}
-	return ops
-}
-
-func uniqueWatchEvents(reports []traffic.ClientReport) map[model.Event]traffic.TimedWatchEvent {
-	persisted := map[model.Event]traffic.TimedWatchEvent{}
-	for _, r := range reports {
-		for _, resp := range r.Watch {
-			for _, event := range resp.Events {
-				persisted[event.Event] = traffic.TimedWatchEvent{Time: resp.Time, WatchEvent: event}
-			}
-		}
-	}
-	return persisted
-}
-
 type Config struct {
 	ExpectRevisionUnique bool
 }