diff --git a/tests/pass_through_tests/test_gemini_with_spend.test.js b/tests/pass_through_tests/test_gemini_with_spend.test.js
index 84010ecee1c..7a6584d1618 100644
--- a/tests/pass_through_tests/test_gemini_with_spend.test.js
+++ b/tests/pass_through_tests/test_gemini_with_spend.test.js
@@ -29,7 +29,7 @@ describe('Gemini AI Tests', () => {
         };
 
         const model = genAI.getGenerativeModel({
-            model: 'gemini-1.5-pro'
+            model: 'gemini-2.5-flash-lite'
         }, requestOptions);
 
         const prompt = 'Say "hello test" and nothing else';
@@ -77,7 +77,7 @@ describe('Gemini AI Tests', () => {
         };
 
         const model = genAI.getGenerativeModel({
-            model: 'gemini-1.5-pro'
+            model: 'gemini-2.5-flash-lite'
         }, requestOptions);
 
         const prompt = 'Say "hello test" and nothing else';
diff --git a/tests/pass_through_tests/test_local_gemini.js b/tests/pass_through_tests/test_local_gemini.js
index 1f3f7f8a0d5..0a72ca5cd7b 100644
--- a/tests/pass_through_tests/test_local_gemini.js
+++ b/tests/pass_through_tests/test_local_gemini.js
@@ -1,13 +1,13 @@
 const { GoogleGenerativeAI, ModelParams, RequestOptions } = require("@google/generative-ai");
 
 const modelParams = {
-    model: 'gemini-1.5-pro',
+    model: 'gemini-2.5-flash-lite',
 };
   
 const requestOptions = {
     baseUrl: 'http://127.0.0.1:4000/gemini',
     customHeaders: {
-        "tags": "gemini-js-sdk,gemini-1.5-pro"
+        "tags": "gemini-js-sdk,gemini-2.5-flash-lite"
     }
 };
   
diff --git a/tests/pass_through_tests/test_local_vertex.js b/tests/pass_through_tests/test_local_vertex.js
index a94c6746e9a..231858cdf9a 100644
--- a/tests/pass_through_tests/test_local_vertex.js
+++ b/tests/pass_through_tests/test_local_vertex.js
@@ -20,7 +20,7 @@ const requestOptions = {
 };
 
 const generativeModel = vertexAI.getGenerativeModel(
-    { model: 'gemini-1.5-pro' },
+    { model: 'gemini-2.5-flash-lite' },
     requestOptions
 );
 
diff --git a/tests/pass_through_tests/test_vertex.test.js b/tests/pass_through_tests/test_vertex.test.js
index dccd6494025..c10889e3a60 100644
--- a/tests/pass_through_tests/test_vertex.test.js
+++ b/tests/pass_through_tests/test_vertex.test.js
@@ -75,7 +75,7 @@ describe('Vertex AI Tests', () => {
         };
 
         const generativeModel = vertexAI.getGenerativeModel(
-            { model: 'gemini-1.5-pro' },
+            { model: 'gemini-2.5-flash-lite' },
             requestOptions
         );
 
@@ -103,7 +103,7 @@ describe('Vertex AI Tests', () => {
         const vertexAI = new VertexAI({project: 'pathrise-convert-1606954137718', location: 'us-central1', apiEndpoint: "localhost:4000/vertex-ai"});
         const customHeaders = new Headers({"x-litellm-api-key": "sk-1234"});
         const requestOptions = {customHeaders: customHeaders};
-        const generativeModel = vertexAI.getGenerativeModel({model: 'gemini-1.5-pro'}, requestOptions);
+        const generativeModel = vertexAI.getGenerativeModel({model: 'gemini-2.5-flash-lite'}, requestOptions);
         const request = {contents: [{role: 'user', parts: [{text: 'What is 2+2?'}]}]};
 
         const result = await generativeModel.generateContent(request);
diff --git a/tests/pass_through_tests/test_vertex_ai.py b/tests/pass_through_tests/test_vertex_ai.py
index 4c321122968..dbcf93ee55d 100644
--- a/tests/pass_through_tests/test_vertex_ai.py
+++ b/tests/pass_through_tests/test_vertex_ai.py
@@ -104,7 +104,7 @@ async def test_basic_vertex_ai_pass_through_with_spendlog():
         api_transport="rest",
     )
 
-    model = GenerativeModel(model_name="gemini-1.5-pro")
+    model = GenerativeModel(model_name="gemini-2.5-flash-lite")
     response = model.generate_content("hi")
 
     print("response", response)
@@ -136,7 +136,7 @@ async def test_basic_vertex_ai_pass_through_streaming_with_spendlog():
         api_transport="rest",
     )
 
-    model = GenerativeModel(model_name="gemini-1.5-pro")
+    model = GenerativeModel(model_name="gemini-2.5-flash-lite")
     response = model.generate_content("hi", stream=True)
 
     for chunk in response:
@@ -192,7 +192,7 @@ async def test_vertex_ai_pass_through_endpoint_context_caching():
     ]
 
     cached_content = caching.CachedContent.create(
-        model_name="gemini-1.5-pro-001",
+        model_name="gemini-2.5-flash-lite-001",
         system_instruction=system_instruction,
         contents=contents,
         ttl=datetime.timedelta(minutes=60),
diff --git a/tests/pass_through_tests/test_vertex_with_spend.test.js b/tests/pass_through_tests/test_vertex_with_spend.test.js
index 9d10ab4a25d..acfeffd6b9f 100644
--- a/tests/pass_through_tests/test_vertex_with_spend.test.js
+++ b/tests/pass_through_tests/test_vertex_with_spend.test.js
@@ -85,7 +85,7 @@ describe('Vertex AI Tests', () => {
         };
 
         const generativeModel = vertexAI.getGenerativeModel(
-            { model: 'gemini-1.5-pro' },
+            { model: 'gemini-2.5-flash-lite' },
             requestOptions
         );
 
@@ -142,7 +142,7 @@ describe('Vertex AI Tests', () => {
         };
 
         const generativeModel = vertexAI.getGenerativeModel(
-            { model: 'gemini-1.5-pro' },
+            { model: 'gemini-2.5-flash-lite' },
             requestOptions
         );