diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 9c39d676..8f099eb4 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -17,7 +17,7 @@ repos:
       - id: end-of-file-fixer
       - id: sort-simple-yaml
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.14.14
+    rev: v0.15.0
     hooks:
       - id: ruff
         args: [--no-cache, --fix, --exit-non-zero-on-fix]
diff --git a/src/drtsans/mono/biosans/api.py b/src/drtsans/mono/biosans/api.py
index 265ea3b4..ef7f5c91 100644
--- a/src/drtsans/mono/biosans/api.py
+++ b/src/drtsans/mono/biosans/api.py
@@ -2178,7 +2178,7 @@ def create_output_dir(output_dir):
 
 def form_output_name(workspace):
     workspace_name = str(workspace)
-    file_name = workspace_name.split("/")[-1].split(".")[0]
+    file_name = workspace_name.rsplit("/", maxsplit=1)[-1].split(".")[0]
     return f"{file_name}.png"
 
 
diff --git a/src/drtsans/mono/gpsans/api.py b/src/drtsans/mono/gpsans/api.py
index d58cec7e..59f4e9a3 100644
--- a/src/drtsans/mono/gpsans/api.py
+++ b/src/drtsans/mono/gpsans/api.py
@@ -1440,7 +1440,7 @@ def reduce_single_configuration(loaded_ws, reduction_input, prefix="", skip_nan=
 
 def form_output_name(workspace):
     workspace_name = str(workspace)
-    file_name = workspace_name.split("/")[-1].split(".")[0]
+    file_name = workspace_name.rsplit("/", maxsplit=1)[-1].split(".")[0]
     return f"{file_name}.png"
 
 
diff --git a/tests/integration/drtsans/tof/eqsans/test_reduction_api.py b/tests/integration/drtsans/tof/eqsans/test_reduction_api.py
index 4d5aa28c..83363820 100644
--- a/tests/integration/drtsans/tof/eqsans/test_reduction_api.py
+++ b/tests/integration/drtsans/tof/eqsans/test_reduction_api.py
@@ -396,7 +396,7 @@ def export_iq_comparison(iq1d_tuple_list: List[Tuple[str, IQmod, str]], png_name
     plt.legend()
 
     # save
-    plt.savefig(f"{png_name.split('.')[0]}_error_bar.png")
+    plt.savefig(f"{png_name.split('.', maxsplit=1)[0]}_error_bar.png")
     # close
     plt.close()