diff --git a/pkg/common/utils.go b/pkg/common/utils.go
index d937d866..692707a0 100644
--- a/pkg/common/utils.go
+++ b/pkg/common/utils.go
@@ -17,6 +17,7 @@ limitations under the License.
 package common
 
 import (
+	"fmt"
 	"math/rand"
 	"regexp"
 	"sync"
@@ -53,13 +54,18 @@ func ValidateContextWindow(promptTokens int, maxCompletionTokens *int64, maxMode
 type Random struct {
 	randomGenerator *rand.Rand
 	randMutex       sync.Mutex
+	uuidNamespace   uuid.UUID
+	uuidName        string
+	uuidCount       int
 }
 
-func NewRandom(seed int64) *Random {
+func NewRandom(seed int64, port int) *Random {
 	src := rand.NewSource(seed)
 	randomGenerator := rand.New(src)
-	uuid.SetRand(rand.New(rand.NewSource(seed)))
-	return &Random{randomGenerator: randomGenerator}
+	return &Random{randomGenerator: randomGenerator,
+		uuidNamespace: uuid.NameSpaceURL,
+		uuidName:      fmt.Sprintf("%d-%d", seed, port),
+	}
 }
 
 // Returns an integer between min and max (included)
@@ -122,7 +128,9 @@ func (r *Random) RandomNormTruncated(mean int, stddev int) int {
 func (r *Random) GenerateUUIDString() string {
 	r.randMutex.Lock()
 	defer r.randMutex.Unlock()
-	return uuid.NewString()
+	name := fmt.Sprintf("%s-%d", r.uuidName, r.uuidCount)
+	r.uuidCount++
+	return uuid.NewSHA1(r.uuidNamespace, []byte(name)).String()
 }
 
 func (r *Random) RandomNumericString(length int) string {
diff --git a/pkg/dataset/custom_dataset_test.go b/pkg/dataset/custom_dataset_test.go
index f406be36..e30141d8 100644
--- a/pkg/dataset/custom_dataset_test.go
+++ b/pkg/dataset/custom_dataset_test.go
@@ -50,7 +50,7 @@ var _ = Describe("CustomDataset", Ordered, func() {
 	)
 
 	BeforeAll(func() {
-		random = common.NewRandom(time.Now().UnixNano())
+		random = common.NewRandom(time.Now().UnixNano(), 8080)
 	})
 
 	BeforeEach(func() {
diff --git a/pkg/dataset/dataset_test.go b/pkg/dataset/dataset_test.go
index 2e978fc5..3e7974a8 100644
--- a/pkg/dataset/dataset_test.go
+++ b/pkg/dataset/dataset_test.go
@@ -34,7 +34,7 @@ var _ = Describe("Dataset", Ordered, func() {
 	)
 
 	BeforeAll(func() {
-		random = common.NewRandom(time.Now().UnixNano())
+		random = common.NewRandom(time.Now().UnixNano(), 8080)
 	})
 
 	BeforeEach(func() {
diff --git a/pkg/kv-cache/kv_cache_test.go b/pkg/kv-cache/kv_cache_test.go
index ebfbc32e..029bbfe2 100644
--- a/pkg/kv-cache/kv_cache_test.go
+++ b/pkg/kv-cache/kv_cache_test.go
@@ -121,7 +121,7 @@ type threadTestCase struct {
 }
 
 var _ = Describe("KV cache", Ordered, func() {
-	random := common.NewRandom(time.Now().UnixNano())
+	random := common.NewRandom(time.Now().UnixNano(), 8080)
 
 	Context("general tests", func() {
 		// check single request processing, ensure cache is valid after request processing started
diff --git a/pkg/llm-d-inference-sim/failures_test.go b/pkg/llm-d-inference-sim/failures_test.go
index 2a2756f3..1cb3b241 100644
--- a/pkg/llm-d-inference-sim/failures_test.go
+++ b/pkg/llm-d-inference-sim/failures_test.go
@@ -35,7 +35,7 @@ var _ = Describe("Failures", func() {
 	Describe("getRandomFailure", Ordered, func() {
 		var random *common.Random
 		BeforeAll(func() {
-			random = common.NewRandom(time.Now().UnixNano())
+			random = common.NewRandom(time.Now().UnixNano(), 8080)
 		})
 
 		It("should return a failure from all types when none specified", func() {
diff --git a/pkg/llm-d-inference-sim/latencies_test.go b/pkg/llm-d-inference-sim/latencies_test.go
index 97435763..886168f3 100644
--- a/pkg/llm-d-inference-sim/latencies_test.go
+++ b/pkg/llm-d-inference-sim/latencies_test.go
@@ -43,7 +43,7 @@ var _ = Describe("Check random latencies", Ordered, func() {
 
 		simulator.metrics.runReqChan = make(chan int64, 100)
 
-		simulator.random = common.NewRandom(time.Now().UnixNano())
+		simulator.random = common.NewRandom(time.Now().UnixNano(), 8080)
 	})
 
 	DescribeTable("should calculate inter token latency correctly",
diff --git a/pkg/llm-d-inference-sim/simulator.go b/pkg/llm-d-inference-sim/simulator.go
index 6eddace5..6fafe9b1 100644
--- a/pkg/llm-d-inference-sim/simulator.go
+++ b/pkg/llm-d-inference-sim/simulator.go
@@ -282,7 +282,7 @@ func (s *VllmSimulator) startSim(ctx context.Context) error {
 }
 
 func (s *VllmSimulator) initializeSim(ctx context.Context) error {
-	s.random = common.NewRandom(s.config.Seed)
+	s.random = common.NewRandom(s.config.Seed, s.config.Port)
 
 	for _, lora := range s.config.LoraModules {
 		s.loraAdaptors.Store(lora.Name, "")