diff --git a/bin/localTest.js b/bin/localTest.js
new file mode 100644
index 0000000..ee7a9ce
--- /dev/null
+++ b/bin/localTest.js
@@ -0,0 +1,22 @@
+#!/usr/bin/env node
+
+// Cross platform replacement for `gulp testVisual --env=local --branch=`git rev-parse --abbrev-ref HEAD``
+// Command substitution with backticks does not work on Windows (cmd.exe), so resolve the
+// branch name here and forward any extra arguments through to gulp.
+
+const { execFileSync, spawnSync } = require('child_process')
+
+const branch = execFileSync('git', ['rev-parse', '--abbrev-ref', 'HEAD'], { encoding: 'utf8' }).trim()
+
+const result = spawnSync(
+  'gulp',
+  ['testVisual', '--env=local', `--branch=${branch}`, ...process.argv.slice(2)],
+  { stdio: 'inherit', shell: true }
+)
+
+if (result.error) {
+  console.error(result.error.message)
+  process.exit(1)
+}
+
+process.exit(result.status === null ? 1 : result.status)
diff --git a/package.json b/package.json
index f13166c..b49cec1 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "lint": "gulp lint",
     "serve": "gulp serve",
     "test": "npm run localTest",
-    "localTest": "gulp testSpecs && gulp testVisual --env=local --branch=`git rev-parse --abbrev-ref HEAD`",
+    "localTest": "node ./bin/localTest.js",
     "gatherDiffs": "rm -rf .tmp/diffs; mkdir -p .tmp/diffs/; BRANCH=`git rev-parse --abbrev-ref HEAD` && for I in `find theSrc/test/snapshots/local/$BRANCH -type d -name __diff_output__`; do cp $I/* .tmp/diffs/ 2> /dev/null; done; true",
     "gatherMasterDiffs": "rm -rf .tmp/diffs; mkdir -p .tmp/diffs/; for I in `find theSrc/test/snapshots/local/master -type d -name __diff_output__`; do cp $I/* .tmp/diffs/ 2> /dev/null; done; true",
     "macOpenDiffs": "open .tmp/diffs",
diff --git a/theSrc/internal_www/data/functional_tests/north_south_axial_data.json b/theSrc/internal_www/data/functional_tests/north_south_axial_data.json
new file mode 100644
index 0000000..56aa527
--- /dev/null
+++ b/theSrc/internal_www/data/functional_tests/north_south_axial_data.json
@@ -0,0 +1,46 @@
+{
+  "coreNodes": [
+    [1,-4],
+    [1,-3],
+    [1,-2],
+    [1,-1],
+    [1, 0],
+    [1, 1],
+    [1, 2],
+    [1, 3],
+    [1, 4]
+  ],
+  "coreLabels": [
+    "A",
+    "B",
+    "C",
+    "D",
+    "E",
+    "F",
+    "G",
+    "H",
+    "I"
+  ],
+  "surfaceNodes": [
+    [1,-4],
+    [1,-3],
+    [1,-2],
+    [1,-1],
+    [1, 0],
+    [1, 1],
+    [1, 2],
+    [1, 3],
+    [1, 4]
+  ],
+  "surfaceLabels": [
+    "A",
+    "B",
+    "C",
+    "D",
+    "E",
+    "F",
+    "G",
+    "H",
+    "I"
+  ]
+}
\ No newline at end of file
diff --git a/theSrc/test/snapshotTestDefinitions/functional_tests/north_south_axial_data.yaml b/theSrc/test/snapshotTestDefinitions/functional_tests/north_south_axial_data.yaml
new file mode 100644
index 0000000..7020ad4
--- /dev/null
+++ b/theSrc/test/snapshotTestDefinitions/functional_tests/north_south_axial_data.yaml
@@ -0,0 +1,10 @@
+version: 1
+title: north_south_axial_data
+general_comments: []
+width: 500
+height: 500
+type: single_page_one_example_per_config
+comments: []
+data: data.functional_tests.north_south_axial_data
+config:
+  - '{}'
diff --git a/theSrc/test/snapshots/ci/master/testPlans/functional_tests/north_south_axial_data.png b/theSrc/test/snapshots/ci/master/testPlans/functional_tests/north_south_axial_data.png
new file mode 100644
index 0000000..4d8eb4b
Binary files /dev/null and b/theSrc/test/snapshots/ci/master/testPlans/functional_tests/north_south_axial_data.png differ
diff --git a/theSrc/test/snapshots/ci/master/testPlans/minimal/minimal_data_functional_tests_north_south_axial_data.png b/theSrc/test/snapshots/ci/master/testPlans/minimal/minimal_data_functional_tests_north_south_axial_data.png
new file mode 100644
index 0000000..cebcf57
Binary files /dev/null and b/theSrc/test/snapshots/ci/master/testPlans/minimal/minimal_data_functional_tests_north_south_axial_data.png differ