diff --git a/run_af2/src/run_af2/_shared.py b/run_af2/src/run_af2/_shared.py
index 9886788d18eb277a17ebcbf24b84ae0f05b51256..bec393f7038fdc5b26c7226dfb35dfb2d3f7a0ec 100644
--- a/run_af2/src/run_af2/_shared.py
+++ b/run_af2/src/run_af2/_shared.py
@@ -116,14 +116,6 @@ def parse_af2_arguments(parser):
         help="Use existing MSAs from current working directory.",
         default=False,
     )
-    af2_group.add_argument(
-        "--no-run-relax",
-        action="store_true",
-        help="Don't Run relaxation on models after prediction. That is "
-        + "inverted of alphafold's own --run_relax, and meant to replace "
-        + "'--run_relax=False'",
-        default=False,
-    )
     af2_group.add_argument(
         "--use-gpu-relax",
         action="store_true",
diff --git a/run_af2/src/run_af2/run_singularity.py b/run_af2/src/run_af2/run_singularity.py
index 1c90ef631171d65b318e1db2d6701b917dcacd79..1628534636607713e9d36e7376efd3f1c7112739 100644
--- a/run_af2/src/run_af2/run_singularity.py
+++ b/run_af2/src/run_af2/run_singularity.py
@@ -117,7 +117,6 @@ def _assemble_singularity_call(  # pylint: disable=too-many-arguments
     db_preset,
     model_preset,
     use_precomputed_msas,
-    no_run_relax,
     use_gpu_relax,
     num_multimer_predictions_per_model,
     data_paths,
@@ -161,7 +160,6 @@ def _assemble_singularity_call(  # pylint: disable=too-many-arguments
 
     bool_args = {
         "use_precomputed_msas": use_precomputed_msas,
-        "run_relax": not no_run_relax,
         "use_gpu_relax": use_gpu_relax,
     }
     for arg, val in bool_args.items():
@@ -213,7 +211,6 @@ def run_af2_singularity_image(  # pylint: disable=too-many-arguments
     db_preset="full_dbs",
     model_preset="monomer",
     use_precomputed_msas=False,
-    no_run_relax=False,
     use_gpu_relax=False,
     num_multimer_predictions_per_model=5,
     af2_image_file=None,
@@ -276,11 +273,6 @@ def run_af2_singularity_image(  # pylint: disable=too-many-arguments
     :param use_precomputed_msas: Use existing MSAs from cwd. Corresponds to the
                                  use_precomputed_msas parameter in AF2.
     :type use_precomputed_msas: :class:`bool`
-    :param no_run_relax: Disable relaxation at the end of modelling.
-                         Corresponds to AF2's no_run_relax parameter but works
-                         oppositely, True means no relaxation, False means
-                         relaxation.
-    :type no_run_relax: :class:`bool`
     :param use_gpu_relax: Run relaxation on GPU. Corresponds to the
                           use_gpu_relax parameter in AF2.
     :type use_gpu_relax: :class:`bool`
@@ -418,7 +410,6 @@ def run_af2_singularity_image(  # pylint: disable=too-many-arguments
         db_preset,
         model_preset,
         use_precomputed_msas,
-        no_run_relax,
         use_gpu_relax,
         num_multimer_predictions_per_model,
         data_paths,
@@ -490,7 +481,6 @@ def main():
             opts.db_preset,
             opts.model_preset,
             opts.use_precomputed_msas,
-            opts.no_run_relax,
             opts.use_gpu_relax,
             opts.num_multimer_predictions_per_model,
             opts.singularity_image,