diff --git a/tests/integration/utils.py b/tests/integration/utils.py
index d008fd41..36899e25 100644
--- a/tests/integration/utils.py
+++ b/tests/integration/utils.py
@@ -2,6 +2,7 @@
 import re
 import shutil
 import subprocess
+import sys
 from typing import List
 
 from mache import MachineInfo
@@ -260,7 +261,12 @@ def substitute_expansions(expansions, file_in, file_out):
                 file_write.write(line)
 
 
-def generate_cfgs(unified_testing=False, dry_run=False):
+def generate_cfgs(
+    unified_testing=False,
+    diags_environment_commands=None,
+    global_time_series_environment_commands=None,
+    dry_run=False,
+):
     git_top_level = (
         subprocess.check_output("git rev-parse --show-toplevel".split())
         .strip()
@@ -273,6 +279,14 @@ def generate_cfgs(unified_testing=False, dry_run=False):
         # The cfg doesn't need this line,
         # but it would be difficult to only write environment_commands in the unified_testing case.
         expansions["environment_commands"] = ""
+
+    if diags_environment_commands:
+        expansions["diags_environment_commands"] = diags_environment_commands
+    if global_time_series_environment_commands:
+        expansions["global_time_series_environment_commands"] = (
+            global_time_series_environment_commands
+        )
+
     machine = expansions["machine"]
 
     if dry_run:
@@ -369,4 +383,12 @@ def generate_cfgs(unified_testing=False, dry_run=False):
 
 
 if __name__ == "__main__":
-    generate_cfgs(unified_testing=False, dry_run=False)
+    if len(sys.argv) <= 2:
+        generate_cfgs(unified_testing=False, dry_run=False)
+    else:
+        generate_cfgs(
+            unified_testing=sys.argv[2] == "True",
+            diags_environment_commands=sys.argv[3],
+            global_time_series_environment_commands=sys.argv[4],
+            dry_run=False,
+        )
diff --git a/tests/scripts/test_dev.bash b/tests/scripts/test_dev.bash
new file mode 100755
index 00000000..f5f521c9
--- /dev/null
+++ b/tests/scripts/test_dev.bash
@@ -0,0 +1,118 @@
+#!/bin/bash
+
+# Before running this script ########################################################
+
+# Set up branch
+# If you want to test `main`, do the following:
+# git fetch upstream main
+# git checkout -b test_main_<date> upstream/main
+# git log # check the commits match https://github.com/E3SM-Project/zppy/commits/main
+
+# Set these parameters:
+
+# Make sure you do not have important changes in any of these directories. This script will reset them!
+ZPPY_DIR=/home/ac.forsyth2/zppy/
+DIAGS_DIR=/home/ac.forsyth2/e3sm_diags/
+ZI_DIR=/home/ac.forsyth2/zppy-interfaces/
+
+ZPPY_DEV=zppy_dev_n516
+DIAGS_DEV=diags_dev_2024_12_13
+ZI_DEV=zi_dev_2024_12_13
+
+DIAGS_ENV_CMD="source /home/ac.forsyth2/miniconda3/etc/profile.d/conda.sh; conda activate ${DIAGS_DEV}"
+ZI_ENV_CMD="source /home/ac.forsyth2/miniconda3/etc/profile.d/conda.sh; conda activate ${ZI_DEV}"
+
+UNIQUE_ID="unique_id"
+
+#####################################################################################
+
+# Set up zppy-interfaces env
+cd ${ZI_DIR}
+git fetch upstream main
+git checkout main upstream/main
+if [ $? != 0 ]; then
+  echo 'ERROR (1): Could not check out zppy-interfaces main branch'
+  exit 1
+fi
+git reset --hard upstream/main
+conda clean --all --y
+# TODO: previous iterations of this script had issues with activating conda environments
+conda env create -f conda/dev.yml -n ${ZI_DEV}
+conda activate ${ZI_DEV}
+pip install .
+pytest tests/global_time_series/test_*.py
+if [ $? != 0 ]; then
+  echo 'ERROR (2): zppy-interfaces unit tests failed'
+  exit 2
+fi
+
+# Set up e3sm_diags env
+cd ${DIAGS_DIR}
+git fetch upstream
+git checkout main
+if [ $? != 0 ]; then
+  echo 'ERROR (3): Could not check out e3sm_diags main branch'
+  exit 3
+fi
+git reset --hard upstream/main
+conda clean --all --y
+conda env create -f conda-env/dev.yml -n ${DIAGS_DEV}
+conda activate ${DIAGS_DEV}
+pip install .
+
+# Set up zppy env
+cd ${ZPPY_DIR}
+# We should already be on the branch we want to test!
+conda clean --all --y
+conda env create -f conda/dev.yml -n ${ZPPY_DEV}
+conda activate ${ZPPY_DEV}
+pip install .
+pytest tests/test_*.py
+if [ $? != 0 ]; then
+  echo 'ERROR (4): zppy unit tests failed'
+  exit 4
+fi
+
+# Integration testing for zppy
+python tests/integration/utils.py False ${DIAGS_DEV} ${ZI_DEV}
+
+
+zppy -c tests/integration/generated/test_weekly_comprehensive_v3_chrysalis.cfg
+zppy -c tests/integration/generated/test_weekly_comprehensive_v2_chrysalis.cfg
+zppy -c tests/integration/generated/test_weekly_bundles_chrysalis.cfg # Runs 1st part of bundles cfg
+
+# TODO: figure out how to wait for all those jobs to finish
+
+zppy -c tests/integration/generated/test_weekly_bundles_chrysalis.cfg
+
+# TODO: figure out how to wait for all those jobs to finish
+
+# Check output
+cd /lcrc/group/e3sm/${USER}/zppy_weekly_comprehensive_v3_output/${UNIQUE_ID}/v3.LR.historical_0051/post/scripts/
+grep -v "OK" *status
+if [ $? == 0 ]; then
+  echo 'ERROR (5): weekly_comprehensive_v3 failed'
+  exit 5
+fi
+
+cd /lcrc/group/e3sm/${USER}/zppy_weekly_comprehensive_v2_output/${UNIQUE_ID}/v2.LR.historical_0201/post/scripts
+grep -v "OK" *status
+if [ $? == 0 ]; then
+  echo 'ERROR (6): weekly_comprehensive_v2 failed'
+  exit 6
+fi
+
+cd /lcrc/group/e3sm/${USER}/zppy_weekly_bundles_output/${UNIQUE_ID}/v3.LR.historical_0051/post/scripts
+grep -v "OK" *status
+if [ $? == 0 ]; then
+  echo 'ERROR (7): weekly_bundles failed'
+  exit 7
+fi
+
+# Run integration tests
+cd ~/ez/zppy
+pytest tests/integration/test_*.py
+if [ $? != 0 ]; then
+  echo 'ERROR (8): zppy integration tests failed'
+  exit 8
+fi