diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 03ab32948..935cdb4c3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -118,7 +118,7 @@ jobs:
       shell: bash -l {0}
       working-directory: ./autotest
       run: |
-        pytest -rP -rx --capture=no -v -n=auto --tb=native --cov=pyemu --cov-report=lcov ${{ matrix.test-path }}
+        pytest -rP -rx --capture=no -v -n=auto --tb=native --durations=20 --cov=pyemu --cov-report=lcov ${{ matrix.test-path }}
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
diff --git a/etc/environment.yml b/etc/environment.yml
index d4ba654e2..84616bbd0 100644
--- a/etc/environment.yml
+++ b/etc/environment.yml
@@ -3,7 +3,8 @@ channels:
   - conda-forge
 dependencies:
   # required
-  - python>=3.8
+  - python>=3.9
+  - libopenblas < 0.3.30
   - numpy
   - pandas
   # optional
diff --git a/pyemu/utils/pst_from.py b/pyemu/utils/pst_from.py
index e741424f6..5a921489b 100644
--- a/pyemu/utils/pst_from.py
+++ b/pyemu/utils/pst_from.py
@@ -1048,7 +1048,7 @@ def _par_prep(
                         sep = " "
                         if rel_filepath.suffix.lower() == ".csv":
                             sep = ","
-                    elif sep == '\s+':
+                    elif sep == r'\s+':
                         sep = " " # sep for saving
                 if pd.api.types.is_integer_dtype(df.columns):  # df.columns.is_integer(): # really!???
                     hheader = False
diff --git a/pyproject.toml b/pyproject.toml
index 2b5b36732..b5c338107 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3 :: Only",
     "Topic :: Scientific/Engineering :: Hydrology",
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 dependencies = [
     "numpy",
     "pandas",