diff --git a/vllm_omni/diffusion/models/longcat_image/pipeline_longcat_image_edit.py b/vllm_omni/diffusion/models/longcat_image/pipeline_longcat_image_edit.py
index 83c4f9a63b..94174067ad 100644
--- a/vllm_omni/diffusion/models/longcat_image/pipeline_longcat_image_edit.py
+++ b/vllm_omni/diffusion/models/longcat_image/pipeline_longcat_image_edit.py
@@ -466,7 +466,7 @@ def check_inputs(
         if height % (self.vae_scale_factor * 2) != 0 or width % (self.vae_scale_factor * 2) != 0:
             logger.warning(
                 "`height` and `width` have to be divisible by "
-                "{self.vae_scale_factor * 2} but are {height} and {width}. "
+                f"{self.vae_scale_factor * 2} but are {height} and {width}. "
                 "Dimensions will be resized accordingly"
             )
 
diff --git a/vllm_omni/diffusion/models/ovis_image/pipeline_ovis_image.py b/vllm_omni/diffusion/models/ovis_image/pipeline_ovis_image.py
index b115afc93e..660338a356 100644
--- a/vllm_omni/diffusion/models/ovis_image/pipeline_ovis_image.py
+++ b/vllm_omni/diffusion/models/ovis_image/pipeline_ovis_image.py
@@ -328,7 +328,7 @@ def check_inputs(
                 "Provide either `prompt` or `prompt_embeds`. Cannot leave both `prompt` and `prompt_embeds` undefined."
             )
         elif prompt is not None and (not isinstance(prompt, str) and not isinstance(prompt, list)):
-            raise ValueError("`prompt` has to be of type `str` or `list[str]` but is {type(prompt)}")
+            raise ValueError(f"`prompt` has to be of type `str` or `list[str]` but is {type(prompt)}")
 
         if negative_prompt is not None and negative_prompt_embeds is not None:
             raise ValueError(
diff --git a/vllm_omni/diffusion/models/qwen_image/pipeline_qwen_image.py b/vllm_omni/diffusion/models/qwen_image/pipeline_qwen_image.py
index cdae76bf6a..6401b526a5 100644
--- a/vllm_omni/diffusion/models/qwen_image/pipeline_qwen_image.py
+++ b/vllm_omni/diffusion/models/qwen_image/pipeline_qwen_image.py
@@ -308,7 +308,7 @@ def check_inputs(
         if height % (self.vae_scale_factor * 2) != 0 or width % (self.vae_scale_factor * 2) != 0:
             logger.warning(
                 f"`height` and `width` have to be divisible by {self.vae_scale_factor * 2} "
-                "but are {height} and {width}. Dimensions will be resized accordingly"
+                f"but are {height} and {width}. Dimensions will be resized accordingly"
             )
 
         # if callback_on_step_end_tensor_inputs is not None and not all(