diff --git a/optimum_benchmark/backends/ipex/backend.py b/optimum_benchmark/backends/ipex/backend.py
index d32a203d..a637ced0 100644
--- a/optimum_benchmark/backends/ipex/backend.py
+++ b/optimum_benchmark/backends/ipex/backend.py
@@ -9,7 +9,7 @@
 from ..base import Backend
 from ..transformers_utils import fast_weights_init
 from .config import IPEXConfig
-from .utils import TASKS_TO_IPEXMODEL
+from .utils import TASKS_TO_IPEXMODELS
 
 if is_accelerate_available():
     from accelerate import Accelerator
@@ -24,8 +24,8 @@ class IPEXBackend(Backend[IPEXConfig]):
     def __init__(self, config: IPEXConfig) -> None:
         super().__init__(config)
 
-        if self.config.task in TASKS_TO_IPEXMODEL:
-            self.ipexmodel_class = get_class(TASKS_TO_IPEXMODEL[self.config.task])
+        if self.config.task in TASKS_TO_IPEXMODELS:
+            self.ipexmodel_class = get_class(TASKS_TO_IPEXMODELS[self.config.task])
             self.logger.info(f"\t+ Using IPEXModel class {self.ipexmodel_class.__name__}")
         else:
             raise NotImplementedError(f"IPEXBackend does not support task {self.config.task}")
diff --git a/optimum_benchmark/backends/ipex/utils.py b/optimum_benchmark/backends/ipex/utils.py
index dd68428e..7b4a83f8 100644
--- a/optimum_benchmark/backends/ipex/utils.py
+++ b/optimum_benchmark/backends/ipex/utils.py
@@ -1,4 +1,4 @@
-TASKS_TO_IPEXMODEL = {
+TASKS_TO_IPEXMODELS = {
     "fill-mask": "optimum.intel.IPEXModelForMaskedLM",
     "text-generation": "optimum.intel.IPEXModelForCausalLM",
     "feature-extraction": "optimum.intel.IPEXModel",
diff --git a/optimum_benchmark/backends/onnxruntime/backend.py b/optimum_benchmark/backends/onnxruntime/backend.py
index b50e2258..ce7386b3 100644
--- a/optimum_benchmark/backends/onnxruntime/backend.py
+++ b/optimum_benchmark/backends/onnxruntime/backend.py
@@ -28,7 +28,7 @@
 from .config import ORTConfig
 from .utils import (
     TASKS_TO_ORTMODELS,
-    TASKS_TO_ORTPIPELINE,
+    TASKS_TO_ORTPIPELINES,
     format_calibration_config,
     format_quantization_config,
 )
@@ -49,8 +49,8 @@ def __init__(self, config: ORTConfig) -> None:
         if self.config.library != "diffusers" and self.config.task in TASKS_TO_ORTMODELS:
             self.ort_model_loader = get_class(TASKS_TO_ORTMODELS[self.config.task])
             self.logger.info(f"Using ORTModel class {self.ort_model_loader.__name__}")
-        elif self.config.library == "diffusers" and self.config.task in TASKS_TO_ORTPIPELINE:
-            self.ort_model_loader = get_class(TASKS_TO_ORTPIPELINE[self.config.task])
+        elif self.config.library == "diffusers" and self.config.task in TASKS_TO_ORTPIPELINES:
+            self.ort_model_loader = get_class(TASKS_TO_ORTPIPELINES[self.config.task])
             self.logger.info(f"Using ORTDiffusionPipeline class {self.ort_model_loader.__name__}")
         else:
             raise NotImplementedError(f"ORTBackend does not support task {self.config.task}")
diff --git a/optimum_benchmark/backends/onnxruntime/utils.py b/optimum_benchmark/backends/onnxruntime/utils.py
index 63598223..e8cbe1eb 100644
--- a/optimum_benchmark/backends/onnxruntime/utils.py
+++ b/optimum_benchmark/backends/onnxruntime/utils.py
@@ -7,7 +7,7 @@
     task: f"optimum.onnxruntime.{task_dict['class'][0].__name__}" for task, task_dict in ORT_SUPPORTED_TASKS.items()
 }
 
-TASKS_TO_ORTPIPELINE = {
+TASKS_TO_ORTPIPELINES = {
     "inpainting": "optimum.onnxruntime.ORTPipelineForInpainting",
     "text-to-image": "optimum.onnxruntime.ORTPipelineForText2Image",
     "image-to-image": "optimum.onnxruntime.ORTPipelineForImage2Image",
diff --git a/optimum_benchmark/backends/openvino/backend.py b/optimum_benchmark/backends/openvino/backend.py
index be903e7d..11be6e13 100644
--- a/optimum_benchmark/backends/openvino/backend.py
+++ b/optimum_benchmark/backends/openvino/backend.py
@@ -9,7 +9,7 @@
 from ..base import Backend
 from ..transformers_utils import fast_weights_init
 from .config import OVConfig as OVBackendConfig
-from .utils import TASKS_OVPIPELINE, TASKS_TO_OVMODEL
+from .utils import TASKS_TO_OVMODELS, TASKS_TO_OVPIPELINES
 
 if is_accelerate_available():
     from accelerate import Accelerator
@@ -24,11 +24,11 @@ class OVBackend(Backend[OVBackendConfig]):
     def __init__(self, config: OVBackendConfig) -> None:
         super().__init__(config)
 
-        if self.config.task in TASKS_TO_OVMODEL:
-            self.ovmodel_class = get_class(TASKS_TO_OVMODEL[self.config.task])
+        if self.config.library != "diffusers" and self.config.task in TASKS_TO_OVMODELS:
+            self.ovmodel_class = get_class(TASKS_TO_OVMODELS[self.config.task])
             self.logger.info(f"\t+ Using OVModel class {self.ovmodel_class.__name__}")
-        elif self.config.task in TASKS_OVPIPELINE:
-            self.ovmodel_class = get_class(TASKS_OVPIPELINE[self.config.task])
+        elif self.config.library == "diffusers" and self.config.task in TASKS_TO_OVPIPELINES:
+            self.ovmodel_class = get_class(TASKS_TO_OVPIPELINES[self.config.task])
             self.logger.info(f"\t+ Using OVDiffusionPipeline class {self.ovmodel_class.__name__}")
         else:
             raise NotImplementedError(f"OVBackend does not support task {self.config.task}")
diff --git a/optimum_benchmark/backends/openvino/utils.py b/optimum_benchmark/backends/openvino/utils.py
index 51f9629c..e382d724 100644
--- a/optimum_benchmark/backends/openvino/utils.py
+++ b/optimum_benchmark/backends/openvino/utils.py
@@ -1,4 +1,4 @@
-TASKS_TO_OVMODEL = {
+TASKS_TO_OVMODELS = {
     "fill-mask": "optimum.intel.openvino.OVModelForMaskedLM",
     "text-generation": "optimum.intel.openvino.OVModelForCausalLM",
     "text2text-generation": "optimum.intel.openvino.OVModelForSeq2SeqLM",
@@ -10,7 +10,7 @@
     "audio-classification": "optimum.intel.openvino.OVModelForAudioClassification",
     "pix2struct": "optimum.intel.openvino.OVModelForPix2Struct",
 }
-TASKS_OVPIPELINE = {
+TASKS_TO_OVPIPELINES = {
     "inpainting": "optimum.intel.openvino.OVPipelineForInpainting",
     "text-to-image": "optimum.intel.openvino.OVPipelineForText2Image",
     "image-to-image": "optimum.intel.openvino.OVPipelineForImage2Image",
diff --git a/optimum_benchmark/backends/tensorrt_llm/backend.py b/optimum_benchmark/backends/tensorrt_llm/backend.py
index 5e7bad89..8cd046eb 100644
--- a/optimum_benchmark/backends/tensorrt_llm/backend.py
+++ b/optimum_benchmark/backends/tensorrt_llm/backend.py
@@ -12,7 +12,7 @@
 from ..base import Backend
 from ..transformers_utils import fast_weights_init
 from .config import TRTLLMConfig
-from .utils import MODEL_TYPE_TO_TRTLLMMODEL
+from .utils import MODEL_TYPE_TO_TRTLLMMODELS
 
 
 class TRTLLMBackend(Backend[TRTLLMConfig]):
@@ -21,8 +21,8 @@ class TRTLLMBackend(Backend[TRTLLMConfig]):
     def __init__(self, config: TRTLLMConfig):
         super().__init__(config)
 
-        if self.config.model_type in MODEL_TYPE_TO_TRTLLMMODEL:
-            self.trtllm_loader = get_class(MODEL_TYPE_TO_TRTLLMMODEL[self.config.model_type])
+        if self.config.model_type in MODEL_TYPE_TO_TRTLLMMODELS:
+            self.trtllm_loader = get_class(MODEL_TYPE_TO_TRTLLMMODELS[self.config.model_type])
             self.logger.info(f"\t+ Using TRTLLMModel class {self.trtllm_loader.__name__}")
         else:
             raise NotImplementedError(f"TRTLLMBackend does not support model_type {self.config.model_type}")
diff --git a/optimum_benchmark/backends/tensorrt_llm/utils.py b/optimum_benchmark/backends/tensorrt_llm/utils.py
index 4574da53..01b6ed0e 100644
--- a/optimum_benchmark/backends/tensorrt_llm/utils.py
+++ b/optimum_benchmark/backends/tensorrt_llm/utils.py
@@ -1 +1 @@
-MODEL_TYPE_TO_TRTLLMMODEL = {"llama": "optimum.nvidia.models.llama.LlamaForCausalLM"}
+MODEL_TYPE_TO_TRTLLMMODELS = {"llama": "optimum.nvidia.models.llama.LlamaForCausalLM"}