diff --git a/timm/layers/norm.py b/timm/layers/norm.py
index 79a19bf323..ec082da2ef 100644
--- a/timm/layers/norm.py
+++ b/timm/layers/norm.py
@@ -104,7 +104,9 @@ def __init__(
         super().__init__(num_channels, eps=eps, elementwise_affine=affine, **kwargs)
 
     def forward(self, x: torch.Tensor) -> torch.Tensor:
-        x = F.layer_norm(x.float(), self.normalized_shape, self.weight, self.bias, self.eps).to(x.dtype)
+        weight = self.weight.float() if self.weight is not None else None
+        bias = self.bias.float() if self.bias is not None else None
+        x = F.layer_norm(x.float(), self.normalized_shape, weight, bias, self.eps).to(x.dtype)
         return x
 
 
@@ -146,7 +148,9 @@ def __init__(
 
     def forward(self, x: torch.Tensor) -> torch.Tensor:
         x = x.permute(0, 2, 3, 1)
-        x = F.layer_norm(x.float(), self.normalized_shape, self.weight, self.bias, self.eps).to(x.dtype)
+        weight = self.weight.float() if self.weight is not None else None
+        bias = self.bias.float() if self.bias is not None else None
+        x = F.layer_norm(x.float(), self.normalized_shape, weight, bias, self.eps).to(x.dtype)
         x = x.permute(0, 3, 1, 2)
         return x
 
@@ -282,7 +286,8 @@ def reset_parameters(self) -> None:
             nn.init.ones_(self.weight)
 
     def forward(self, x: torch.Tensor) -> torch.Tensor:
-        x = rms_norm(x.float(), self.normalized_shape, self.weight, self.eps).to(x.dtype)
+        weight = self.weight.float() if self.weight is not None else None
+        x = rms_norm(x.float(), self.normalized_shape, weight, self.eps).to(x.dtype)
         return x
 
 
@@ -381,7 +386,8 @@ def reset_parameters(self) -> None:
             nn.init.ones_(self.weight)
 
     def forward(self, x: torch.Tensor) -> torch.Tensor:
-        x = rms_norm2d(x.float(), self.normalized_shape, self.weight, self.eps).to(x.dtype)
+        weight = self.weight.float() if self.weight is not None else None
+        x = rms_norm2d(x.float(), self.normalized_shape, weight, self.eps).to(x.dtype)
         return x
 
 
@@ -470,7 +476,8 @@ def reset_parameters(self) -> None:
             nn.init.ones_(self.weight)
 
     def forward(self, x: torch.Tensor) -> torch.Tensor:
-        x = simple_norm(x.float(), self.normalized_shape, self.weight, self.eps).to(x.dtype)
+        weight = self.weight.float() if self.weight is not None else None
+        x = simple_norm(x.float(), self.normalized_shape, weight, self.eps).to(x.dtype)
         return x
 
 
@@ -562,6 +569,7 @@ def reset_parameters(self) -> None:
 
     def forward(self, x: torch.Tensor) -> torch.Tensor:
         x = x.permute(0, 2, 3, 1)
-        x = simple_norm(x.float(), self.normalized_shape, self.weight, self.eps).to(x.dtype)
+        weight = self.weight.float() if self.weight is not None else None
+        x = simple_norm(x.float(), self.normalized_shape, weight, self.eps).to(x.dtype)
         x = x.permute(0, 3, 1, 2)
         return x
diff --git a/timm/layers/norm_act.py b/timm/layers/norm_act.py
index 7dbb5e0f2c..d362a95079 100644
--- a/timm/layers/norm_act.py
+++ b/timm/layers/norm_act.py
@@ -482,7 +482,9 @@ def __init__(
         self.act = _create_act(act_layer, act_kwargs=act_kwargs, inplace=inplace, apply_act=apply_act)
 
     def forward(self, x):
-        x = F.layer_norm(x.float(), self.normalized_shape, self.weight, self.bias, self.eps).to(x.dtype)
+        weight = self.weight.float() if self.weight is not None else None
+        bias = self.bias.float() if self.bias is not None else None
+        x = F.layer_norm(x.float(), self.normalized_shape, weight, bias, self.eps).to(x.dtype)
         x = self.drop(x)
         x = self.act(x)
         return x
@@ -540,7 +542,9 @@ def __init__(
 
     def forward(self, x):
         x = x.permute(0, 2, 3, 1)
-        x = F.layer_norm(x.float(), self.normalized_shape, self.weight, self.bias, self.eps).to(x.dtype)
+        weight = self.weight.float() if self.weight is not None else None
+        bias = self.bias.float() if self.bias is not None else None
+        x = F.layer_norm(x.float(), self.normalized_shape, weight, bias, self.eps).to(x.dtype)
         x = x.permute(0, 3, 1, 2)
         x = self.drop(x)
         x = self.act(x)
@@ -605,7 +609,8 @@ def __init__(
         self.act = _create_act(act_layer, act_kwargs=act_kwargs, inplace=inplace, apply_act=apply_act)
 
     def forward(self, x: torch.Tensor) -> torch.Tensor:
-        x = rms_norm(x.float(), self.normalized_shape, self.weight, self.eps).to(x.dtype)
+        weight = self.weight.float() if self.weight is not None else None
+        x = rms_norm(x.float(), self.normalized_shape, weight, self.eps).to(x.dtype)
         x = self.drop(x)
         x = self.act(x)
         return x
@@ -667,7 +672,8 @@ def __init__(
         self.act = _create_act(act_layer, act_kwargs=act_kwargs, inplace=inplace, apply_act=apply_act)
 
     def forward(self, x: torch.Tensor) -> torch.Tensor:
-        x = rms_norm2d(x.float(), self.normalized_shape, self.weight, self.eps).to(x.dtype)
+        weight = self.weight.float() if self.weight is not None else None
+        x = rms_norm2d(x.float(), self.normalized_shape, weight, self.eps).to(x.dtype)
         x = self.drop(x)
         x = self.act(x)
         return x
diff --git a/timm/models/efficientnet.py b/timm/models/efficientnet.py
index 7f2f5aa341..d1976944da 100644
--- a/timm/models/efficientnet.py
+++ b/timm/models/efficientnet.py
@@ -2881,22 +2881,35 @@ def test_efficientnet(pretrained=False, **kwargs) -> EfficientNet:
 
 @register_model
 def test_efficientnet_gn(pretrained=False, **kwargs) -> EfficientNet:
+
     model = _gen_test_efficientnet(
-        'test_efficientnet_gn', pretrained=pretrained, norm_layer=partial(GroupNormAct, group_size=8), **kwargs)
+        'test_efficientnet_gn',
+        pretrained=pretrained,
+        norm_layer=kwargs.pop('norm_layer', partial(GroupNormAct, group_size=8)),
+        **kwargs
+    )
     return model
 
 
 @register_model
 def test_efficientnet_ln(pretrained=False, **kwargs) -> EfficientNet:
     model = _gen_test_efficientnet(
-        'test_efficientnet_ln', pretrained=pretrained, norm_layer=LayerNormAct2d, **kwargs)
+        'test_efficientnet_ln',
+        pretrained=pretrained,
+        norm_layer=kwargs.pop('norm_layer', LayerNormAct2d),
+        **kwargs
+    )
     return model
 
 
 @register_model
 def test_efficientnet_evos(pretrained=False, **kwargs) -> EfficientNet:
     model = _gen_test_efficientnet(
-        'test_efficientnet_evos', pretrained=pretrained, norm_layer=partial(EvoNorm2dS0, group_size=8), **kwargs)
+        'test_efficientnet_evos',
+        pretrained=pretrained,
+        norm_layer=kwargs.pop('norm_layer', partial(EvoNorm2dS0, group_size=8)),
+        **kwargs
+    )
     return model