diff --git a/bigscience/gins/enc_dec_c4_span_corruption_normalised_loss.gin b/bigscience/gins/enc_dec_c4_span_corruption_normalised_loss.gin
new file mode 100644
index 000000000..cc3d5e914
--- /dev/null
+++ b/bigscience/gins/enc_dec_c4_span_corruption_normalised_loss.gin
@@ -0,0 +1,152 @@
+from __gin__ import dynamic_registration
+import __main__ as train_script
+import seqio
+from t5x import adafactor
+from t5x.examples.t5 import network
+from t5x import gin_utils
+from t5x import models
+from t5x import partitioning
+from t5x import trainer
+from t5x import utils
+import task
+
+# Macros:
+# ==============================================================================
+DROPOUT_RATE = 0.0
+LABEL_SMOOTHING = 0.0
+LOSS_NORMALIZING_FACTOR = 233472 # 2048 * 114
+MIXTURE_OR_TASK_MODULE = 't5.data.mixtures'
+MIXTURE_OR_TASK_NAME = 'c4_v220_span_corruption'
+MODEL = @models.EncoderDecoderModel()
+MODEL_DIR = 'gs://bigscience-t5x/enc_dec_c4_span_corruption_normalised_loss'
+OPTIMIZER = @adafactor.Adafactor()
+RANDOM_SEED = None
+SHUFFLE_TRAIN_EXAMPLES = True
+TASK_FEATURE_LENGTHS = {'inputs': 512, 'targets': 114}
+TRAIN_STEPS = 524288
+USE_CACHED_TASKS = True
+USE_HARDWARE_RNG = False
+VOCABULARY = @seqio.SentencePieceVocabulary()
+Z_LOSS = 0.0001
+
+# Parameters for adafactor.Adafactor:
+# ==============================================================================
+adafactor.Adafactor.decay_rate = 0.8
+adafactor.Adafactor.logical_factor_rules = \
+    @adafactor.standard_logical_factor_rules()
+adafactor.Adafactor.step_offset = 0
+
+# Parameters for utils.CheckpointConfig:
+# ==============================================================================
+utils.CheckpointConfig.restore = @utils.RestoreCheckpointConfig()
+utils.CheckpointConfig.save = @utils.SaveCheckpointConfig()
+
+# Parameters for utils.create_learning_rate_scheduler:
+# ==============================================================================
+utils.create_learning_rate_scheduler.base_learning_rate = 1.0
+utils.create_learning_rate_scheduler.factors = 'constant * rsqrt_decay'
+utils.create_learning_rate_scheduler.warmup_steps = 10000
+
+# Parameters for train/utils.DatasetConfig:
+# ==============================================================================
+train/utils.DatasetConfig.batch_size = 2048
+train/utils.DatasetConfig.mixture_or_task_name = %MIXTURE_OR_TASK_NAME
+train/utils.DatasetConfig.module = %MIXTURE_OR_TASK_MODULE
+train/utils.DatasetConfig.pack = True
+train/utils.DatasetConfig.seed = None
+train/utils.DatasetConfig.shuffle = %SHUFFLE_TRAIN_EXAMPLES
+train/utils.DatasetConfig.split = 'train'
+train/utils.DatasetConfig.task_feature_lengths = %TASK_FEATURE_LENGTHS
+train/utils.DatasetConfig.use_cached = True
+train/utils.DatasetConfig.use_custom_packing_ops = False
+
+# Parameters for train_eval/utils.DatasetConfig:
+# ==============================================================================
+train_eval/utils.DatasetConfig.batch_size = 2048
+train_eval/utils.DatasetConfig.mixture_or_task_name = %MIXTURE_OR_TASK_NAME
+train_eval/utils.DatasetConfig.module = %MIXTURE_OR_TASK_MODULE
+train_eval/utils.DatasetConfig.pack = True
+train_eval/utils.DatasetConfig.seed = 42
+train_eval/utils.DatasetConfig.shuffle = False
+train_eval/utils.DatasetConfig.split = 'validation'
+train_eval/utils.DatasetConfig.task_feature_lengths = %TASK_FEATURE_LENGTHS
+train_eval/utils.DatasetConfig.use_cached = True
+train_eval/utils.DatasetConfig.use_custom_packing_ops = False
+
+# Parameters for models.EncoderDecoderModel:
+# ==============================================================================
+models.EncoderDecoderModel.input_vocabulary = %VOCABULARY
+models.EncoderDecoderModel.module = @network.Transformer()
+models.EncoderDecoderModel.optimizer_def = %OPTIMIZER
+models.EncoderDecoderModel.output_vocabulary = %VOCABULARY
+
+# Parameters for models.EncoderDecoderModel.loss_fn:
+# ==============================================================================
+models.EncoderDecoderModel.loss_fn.label_smoothing = %LABEL_SMOOTHING
+models.EncoderDecoderModel.loss_fn.loss_normalizing_factor = \
+    %LOSS_NORMALIZING_FACTOR
+models.EncoderDecoderModel.loss_fn.z_loss = %Z_LOSS
+
+# Parameters for partitioning.ModelBasedPjitPartitioner:
+# ==============================================================================
+partitioning.ModelBasedPjitPartitioner.logical_axis_rules = \
+    @task.fully_sharded_logical_axis_rules()
+partitioning.ModelBasedPjitPartitioner.model_parallel_submesh = (4, 1, 1, 1)
+partitioning.ModelBasedPjitPartitioner.num_partitions = 1
+
+# Parameters for utils.RestoreCheckpointConfig:
+# ==============================================================================
+utils.RestoreCheckpointConfig.path = []
+
+# Parameters for utils.SaveCheckpointConfig:
+# ==============================================================================
+utils.SaveCheckpointConfig.dtype = 'float32'
+utils.SaveCheckpointConfig.keep = None
+utils.SaveCheckpointConfig.period = 2000
+utils.SaveCheckpointConfig.save_dataset = False
+
+# Parameters for seqio.SentencePieceVocabulary:
+# ==============================================================================
+seqio.SentencePieceVocabulary.sentencepiece_model_file = \
+    'gs://t5-data/vocabs/cc_all.32000.100extra/sentencepiece.model'
+
+# Parameters for network.T5Config:
+# ==============================================================================
+network.T5Config.dropout_rate = %DROPOUT_RATE
+network.T5Config.dtype = 'bfloat16'
+network.T5Config.emb_dim = 4096
+network.T5Config.head_dim = 64
+network.T5Config.logits_via_embedding = True
+network.T5Config.mlp_activations = ('gelu', 'linear')
+network.T5Config.mlp_dim = 10240
+network.T5Config.num_decoder_layers = 24
+network.T5Config.num_encoder_layers = 24
+network.T5Config.num_heads = 64
+network.T5Config.vocab_size = 32128
+
+# Parameters for train_script.train:
+# ==============================================================================
+train_script.train.checkpoint_cfg = @utils.CheckpointConfig()
+train_script.train.eval_period = 1000
+train_script.train.eval_steps = 100
+train_script.train.infer_eval_dataset_cfg = None
+train_script.train.model = %MODEL
+train_script.train.model_dir = %MODEL_DIR
+train_script.train.partitioner = @partitioning.ModelBasedPjitPartitioner()
+train_script.train.random_seed = None
+train_script.train.stats_period = 200
+train_script.train.summarize_config_fn = @gin_utils.summarize_gin_config
+train_script.train.total_steps = %TRAIN_STEPS
+train_script.train.train_dataset_cfg = @train/utils.DatasetConfig()
+train_script.train.train_eval_dataset_cfg = @train_eval/utils.DatasetConfig()
+train_script.train.trainer_cls = @trainer.Trainer
+train_script.train.use_hardware_rng = %USE_HARDWARE_RNG
+
+# Parameters for trainer.Trainer:
+# ==============================================================================
+trainer.Trainer.learning_rate_fn = @utils.create_learning_rate_scheduler()
+trainer.Trainer.num_microbatches = None
+
+# Parameters for network.Transformer:
+# ==============================================================================
+network.Transformer.config = @network.T5Config()
diff --git a/bigscience/scripts/setup_vm.sh b/bigscience/scripts/setup_vm.sh
index 0032724b6..70e033453 100644
--- a/bigscience/scripts/setup_vm.sh
+++ b/bigscience/scripts/setup_vm.sh
@@ -29,6 +29,7 @@ popd
 #rm -rf t5x
 git clone https://github.com/bigscience-workshop/t5x.git
 pushd t5x
+git checkout thomas/test_loss_normalisation
 pip3 install -e .
 popd