backport reqres token fix to 0.17.x (#9685)

backports the fix from https://github.com/inventree/InvenTree/pull/9585

.github/workflows/release.yaml

@@ -6,10 +6,12 @@ on:
     types: [published]
 permissions:
   contents: read
+env:
+  python_version: 3.9
 
 jobs:
   stable:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     name: Write release to stable branch
     permissions:
       contents: write
@@ -32,7 +34,7 @@ jobs:
           force: true
 
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     name: Build and attest frontend
     permissions:
       id-token: write
@@ -83,3 +85,50 @@ jobs:
           file: ${{ steps.attest.outputs.bundle-path}}
           tag: ${{ github.ref }}
           overwrite: true
+
+  docs:
+    runs-on: ubuntu-24.04
+    name: Build and publish documentation
+    permissions:
+      contents: write
+    env:
+      INVENTREE_DB_ENGINE: sqlite3
+      INVENTREE_DB_NAME: inventree
+      INVENTREE_MEDIA_ROOT: /home/runner/work/InvenTree/test_inventree_media
+      INVENTREE_STATIC_ROOT: /home/runner/work/InvenTree/test_inventree_static
+      INVENTREE_BACKUP_DIR: /home/runner/work/InvenTree/test_inventree_backup
+      INVENTREE_SITE_URL: http://localhost:8000
+      INVENTREE_DEBUG: true
+
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # pin@v4.2.2
+        with:
+          persist-credentials: false
+      - name: Environment Setup
+        uses: ./.github/actions/setup
+        with:
+          install: true
+          npm: true
+      - name: Install dependencies
+        run: |
+          pip install --require-hashes -r contrib/dev_reqs/requirements.txt
+          pip install --require-hashes -r docs/requirements.txt
+      - name: Build documentation
+        run: |
+          invoke migrate
+          invoke int.export-definitions --basedir "docs"
+          invoke dev.schema --filename docs/schema.yml --ignore-warnings
+          python docs/extract_schema.py docs/schema.yml
+          mkdocs build  -f docs/mkdocs.yml
+      - name: Zip build docs
+        run: |
+          cd docs/site
+          zip -r docs-html.zip *
+      - name: Publish documentation
+        uses: svenstaro/upload-release-action@04733e069f2d7f7f0b4aebc4fbdbce8613b03ccd # pin@2.9.0
+        with:
+          repo_token: ${{ secrets.GITHUB_TOKEN }}
+          file: docs/site/docs-html.zip
+          asset_name: docs-html.zip
+          tag: ${{ github.ref }}
+          overwrite: true

docs/docs/start/config.md

@@ -75,7 +75,7 @@ The site URL is the URL that users will use to access the InvenTree server. For
 
 ### Timezone
 
-By default, the InvenTree server is configured to use the UTC timezone. This can be adjusted to your desired local timezone. You can refer to [Wikipedia](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) for a list of available timezones. Use the values specified in the *TZ Identifier* column in the linked page.
+By default, the InvenTree server is configured to use the UTC timezone. This can be adjusted to your desired local timezone. You can refer to [Wikipedia](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) for a list of available timezones. Use the values specified in the *TZ Identifier* column in the linked page. For example, to change to the United States Pacific timezone, set `INVENTREE_TIMEZONE='America/Los_Angeles'`.
 
 Date and time values are stored in the database in UTC format, and are converted to the selected timezone for display in the user interface or API.
 

docs/requirements.txt

@@ -1,8 +1,8 @@
 # This file was autogenerated by uv via the following command:
 #    uv pip compile docs/requirements.in -o docs/requirements.txt --no-strip-extras --generate-hashes
-anyio==4.3.0 \
-    --hash=sha256:048e05d0f6caeed70d731f3db756d35dcc1f35747c8c403364a8332c630441b8 \
-    --hash=sha256:f75253795a87df48568485fd18cdd2a3fa5c4f7c5be8e5e36637733fce06fed6
+anyio==4.9.0 \
+    --hash=sha256:673c0c244e15788651a4ff38710fea9675823028a6f08a5eda409e0c9840a028 \
+    --hash=sha256:9f76d541cad6e36af7beb62e978876f3b41e3e04f2c1fbf0884604c0a9c4d93c
     # via httpx
 babel==2.15.0 \
     --hash=sha256:08706bdad8d0a3413266ab61bd6c34d0c28d6e1e7badf40a2cebe67644e2e1fb \
@@ -126,9 +126,9 @@ colorama==0.4.6 \
     # via
     #   griffe
     #   mkdocs-material
-essentials==1.1.5 \
-    --hash=sha256:8736f738bb2c51d5069b2de2cf9146f7d402f25f9f95636781e59a422c908c46 \
-    --hash=sha256:905fa4a69fcd2b2cf41ecc6cc65827e30c87ef91f3f5c71540bcc5e984fa8360
+essentials==1.1.6 \
+    --hash=sha256:3fd26923f5f2ece51a219dbb17b1fb22c9190d70fa2104919be92a6419521877 \
+    --hash=sha256:a470e693d83c13369ebf1f488d60236b4ea99400f38db6b7224e2808c1369256
     # via essentials-openapi
 essentials-openapi==1.0.9 \
     --hash=sha256:1431e98ef0a442f1919fd9833385bf44d832c355fd05919dc06d43d4da0f8ef4 \
@@ -150,13 +150,13 @@ gitpython==3.1.43 \
     --hash=sha256:35f314a9f878467f5453cc1fee295c3e18e52f1b99f10f6cf5b1682e968a9e7c \
     --hash=sha256:eec7ec56b92aad751f9912a73404bc02ba212a23adb2c7098ee668417051a1ff
     # via mkdocs-git-revision-date-localized-plugin
-griffe==0.45.1 \
-    --hash=sha256:12194c10ae07a7f46708741ad78419362cf8e5c883f449c7c48de1686611b853 \
-    --hash=sha256:84ce9243a9e63c07d55563a735a0d07ef70b46c455616c174010e7fc816f4648
+griffe==1.7.3 \
+    --hash=sha256:52ee893c6a3a968b639ace8015bec9d36594961e156e23315c8e8e51401fa50b \
+    --hash=sha256:c6b3ee30c2f0f17f30bcdef5068d6ab7a2a4f1b8bf1a3e74b56fffd21e1c5f75
     # via mkdocstrings-python
-h11==0.14.0 \
-    --hash=sha256:8f19fbbe99e72420ff35c00b27a34cb9937e902a8b810e2c88300c6f0a3b699d \
-    --hash=sha256:e3fe4ac4b851c468cc8363d500db52c2ead036020723024a109d37346efaa761
+h11==0.16.0 \
+    --hash=sha256:4e35b956cf45792e4caa5885e69fba00bdbc6ffafbfa020300e549b208ee5ff1 \
+    --hash=sha256:63cf8bbe7522de3bf65932fda1d9c2772064ffb3dae62d55932da54b31cb6c86
     # via httpcore
 hjson==3.1.0 \
     --hash=sha256:55af475a27cf83a7969c808399d7bccdec8fb836a07ddbd574587593b9cdcf75 \
@@ -164,9 +164,9 @@ hjson==3.1.0 \
     # via
     #   mkdocs-macros-plugin
     #   super-collections
-httpcore==1.0.5 \
-    --hash=sha256:34a38e2f9291467ee3b44e89dd52615370e152954ba21721378a87b2960f7a61 \
-    --hash=sha256:421f18bac248b25d310f3cacd198d55b8e6125c107797b609ff9b7a6ba7991b5
+httpcore==1.0.9 \
+    --hash=sha256:2d400746a40668fc9dec9810239072b40b4484b640a8c38fd654a024c7a1bf55 \
+    --hash=sha256:6e34463af53fd2ab5d807f399a9b45ea31c3dfa2276f15a2c3f00afff6e176e8
     # via httpx
 httpx==0.27.0 \
     --hash=sha256:71d5465162c13681bff01ad59b2cc68dd838ea1f10e51574bac27103f00c91a5 \
@@ -196,9 +196,9 @@ jinja2==3.1.4 \
     #   mkdocs-material
     #   mkdocstrings
     #   neoteroi-mkdocs
-markdown==3.6 \
-    --hash=sha256:48f276f4d8cfb8ce6527c8f79e2ee29708508bf4d40aa410fbc3b4ee832c850f \
-    --hash=sha256:ed4f41f6daecbeeb96e576ce414c41d2d876daa9a16cb35fa8ed8c2ddfad0224
+markdown==3.8 \
+    --hash=sha256:794a929b79c5af141ef5ab0f2f642d0f7b1872981250230e72682346f7cc90dc \
+    --hash=sha256:7df81e63f0df5c4b24b7d156eb81e4690595239b7d70937d0409f1b0de319c6f
     # via
     #   mkdocs
     #   mkdocs-autorefs
@@ -302,7 +302,9 @@ mkdocs==1.6.1 \
 mkdocs-autorefs==1.2.0 \
     --hash=sha256:a86b93abff653521bda71cf3fc5596342b7a23982093915cb74273f67522190f \
     --hash=sha256:d588754ae89bd0ced0c70c06f58566a4ee43471eeeee5202427da7de9ef85a2f
-    # via mkdocstrings
+    # via
+    #   mkdocstrings
+    #   mkdocstrings-python
 mkdocs-get-deps==0.2.0 \
     --hash=sha256:162b3d129c7fad9b19abfdcb9c1458a651628e4b1dea628ac68790fb3061c60c \
     --hash=sha256:2bf11d0b133e77a0dd036abeeb06dec8775e46efa526dc70667d8863eefc6134
@@ -337,17 +339,17 @@ mkdocstrings[python]==0.27.0 \
     # via
     #   -r docs/requirements.in
     #   mkdocstrings-python
-mkdocstrings-python==1.10.2 \
-    --hash=sha256:38a4fd41953defb458a107033440c229c7e9f98f35a24e84d888789c97da5a63 \
-    --hash=sha256:e8e596b37f45c09b67bec253e035fe18988af5bbbbf44e0ccd711742eed750e5
+mkdocstrings-python==1.13.0 \
+    --hash=sha256:2dbd5757e8375b9720e81db16f52f1856bf59905428fd7ef88005d1370e2f64c \
+    --hash=sha256:b88bbb207bab4086434743849f8e796788b373bd32e7bfefbf8560ac45d88f97
     # via mkdocstrings
-neoteroi-mkdocs==1.1.0 \
-    --hash=sha256:609aae655e781c7aec517ab14759c34ce896b8132d1df4b9c2e504779c2e48ef \
-    --hash=sha256:9c59aebf83ca09d1d486bf8c0351e6ddfa912f09413d153ecabc5cd268a3155a
+neoteroi-mkdocs==1.1.2 \
+    --hash=sha256:95a8b8e6b89a54a6a731e68329c7bb03e86f46deb74fe2a95de307c9702e7af9 \
+    --hash=sha256:a40475142b7067f5b88108d2e164a6c3d6ed98af311402bd0833417bdb0dd6bc
     # via -r docs/requirements.in
-packaging==24.0 \
-    --hash=sha256:2ddfb553fdf02fb784c234c7ba6ccc288296ceabec964ad2eae3777778130bc5 \
-    --hash=sha256:eb82c5e3e56209074766e6885bb04b8c38a0c015d0a30036ebe7ece34c9989e9
+packaging==25.0 \
+    --hash=sha256:29572ef2b1f17581046b3a2227d5c611fb25ec70ca1ba8554b24b0e69331a484 \
+    --hash=sha256:d443872c98d677bf60f6a1f2f8c1cb748e8fe762d2bf9d3148b5599295b0fc4f
     # via
     #   mkdocs
     #   mkdocs-macros-plugin
@@ -360,15 +362,15 @@ pathspec==0.12.1 \
     # via
     #   mkdocs
     #   mkdocs-macros-plugin
-platformdirs==4.2.2 \
-    --hash=sha256:2d7a1657e36a80ea911db832a8a6ece5ee53d8de21edd5cc5879af6530b1bfee \
-    --hash=sha256:38b7b51f512eed9e84a22788b4bce1de17c0adb134d6becb09836e37d8654cd3
+platformdirs==4.3.7 \
+    --hash=sha256:a03875334331946f13c549dbd8f4bac7a13a50a895a0eb1e8c6a8ace80d40a94 \
+    --hash=sha256:eb437d586b6a0986388f0d6f74aa0cde27b48d0e3d66843640bfb6bdcdb6e351
     # via
     #   mkdocs-get-deps
     #   mkdocstrings
-pygments==2.18.0 \
-    --hash=sha256:786ff802f32e91311bff3889f6e9a86e81505fe99f2735bb6d60ae0c5004f199 \
-    --hash=sha256:b8e6aca0523f3ab76fee51799c488e38782ac06eafcf95e7ba832985c8e7b13a
+pygments==2.19.1 \
+    --hash=sha256:61c16d2a8576dc0649d9f39e089b5f02bcd27fba10d8fb4dcc28173f7a45151f \
+    --hash=sha256:9ea1544ad55cecf4b8242fab6dd35a93bbce657034b0611ee383099054ab6d8c
     # via
     #   mkdocs-material
     #   rich
@@ -384,9 +386,9 @@ python-dateutil==2.9.0.post0 \
     # via
     #   ghp-import
     #   mkdocs-macros-plugin
-pytz==2024.1 \
-    --hash=sha256:2a29735ea9c18baf14b448846bde5a48030ed267578472d8955cd0e7443a9812 \
-    --hash=sha256:328171f4e3623139da4983451950b28e95ac706e13f3f2630a879749e7a8b319
+pytz==2025.2 \
+    --hash=sha256:360b9e3dbb49a209c21ad61809c7fb453643e048b38924c765813546746e81c3 \
+    --hash=sha256:5ddf76296dd8c44c26eb8f4b6f35488f3ccbf6fbbd7adee0b7262d43f0ec2f00
     # via mkdocs-git-revision-date-localized-plugin
 pyyaml==6.0.2 \
     --hash=sha256:01179a4a8559ab5de078078f37e5c1a30d76bb88519906844fd7bdea1b7729ff \
@@ -553,9 +555,9 @@ requests==2.32.3 \
     --hash=sha256:55365417734eb18255590a9ff9eb97e9e1da868d4ccd6402399eaf68af20a760 \
     --hash=sha256:70761cfe03c773ceb22aa2f671b4757976145175cdfca038c02654d061d6dcc6
     # via mkdocs-material
-rich==13.7.1 \
-    --hash=sha256:4edbae314f59eb482f54e9e30bf00d33350aaa94f4bfcd4e9e3110e64d0d7222 \
-    --hash=sha256:9be308cb1fe2f1f57d67ce99e95af38a1e2bc71ad9813b0e247cf7ffbcc3a432
+rich==14.0.0 \
+    --hash=sha256:1c9491e1951aac09caffd42f448ee3d04e58923ffe14993f6e83068dc395d7e0 \
+    --hash=sha256:82f1bc23a6a21ebca4ae0c45af9bdbc492ed20231dcb63f297d6d1021a9d5725
     # via neoteroi-mkdocs
 six==1.16.0 \
     --hash=sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926 \
@@ -575,19 +577,20 @@ super-collections==0.5.3 \
     --hash=sha256:907d35b25dc4070910e8254bf2f5c928348af1cf8a1f1e8259e06c666e902cff \
     --hash=sha256:94c1ec96c0a0d5e8e7d389ed8cde6882ac246940507c5e6b86e91945c2968d46
     # via mkdocs-macros-plugin
-termcolor==2.4.0 \
-    --hash=sha256:9297c0df9c99445c2412e832e882a7884038a25617c60cea2ad69488d4040d63 \
-    --hash=sha256:aab9e56047c8ac41ed798fa36d892a37aca6b3e9159f3e0c24bc64a9b3ac7b7a
+termcolor==3.0.1 \
+    --hash=sha256:a6abd5c6e1284cea2934443ba806e70e5ec8fd2449021be55c280f8a3731b611 \
+    --hash=sha256:da1ed4ec8a5dc5b2e17476d859febdb3cccb612be1c36e64511a6f2485c10c69
     # via mkdocs-macros-plugin
-typing-extensions==4.12.2 \
-    --hash=sha256:04e5ca0351e0f3f85c6853954072df659d0d13fac324d0072316b67d7794700d \
-    --hash=sha256:1a7ead55c7e559dd4dee8856e3a88b41225abfe1ce8df57b7c13915fe121ffb8
+typing-extensions==4.13.2 \
+    --hash=sha256:a439e7c04b49fec3e5d3e2beaa21755cadbbdc391694e28ccdd36ca4a1408f8c \
+    --hash=sha256:e6c81219bd689f51865d9e372991c540bda33a0379d5573cddb9a3a23f7caaef
     # via
     #   anyio
     #   mkdocstrings
-urllib3==2.2.2 \
-    --hash=sha256:a448b2f64d686155468037e1ace9f2d2199776e17f0a46610480d311f73e3472 \
-    --hash=sha256:dd505485549a7a552833da5e6063639d0d177c04f23bc3864e41e5dc5f612168
+    #   rich
+urllib3==2.4.0 \
+    --hash=sha256:414bc6535b787febd7567804cc015fee39daab8ad86268f1310a9250697de466 \
+    --hash=sha256:4e16665048960a0900c702d4a66415956a584919c03361cac9f1df5c5dd7e813
     # via requests
 watchdog==4.0.0 \
     --hash=sha256:11e12fafb13372e18ca1bbf12d50f593e7280646687463dd47730fd4f4d5d257 \

src/backend/InvenTree/InvenTree/fields.py

@@ -36,9 +36,11 @@ class InvenTreeRestURLField(RestURLField):
         """Override default validation behaviour for this field type."""
         strict_urls = get_global_setting('INVENTREE_STRICT_URLS', cache=False)
 
-        if not strict_urls and data is not empty and '://' not in data:
-            # Validate as if there were a schema provided
-            data = 'http://' + data
+        if not strict_urls and data is not empty and data is not None:
+            data = str(data).strip()
+            if data and '://' not in data:
+                # Validate as if there were a schema provided
+                data = 'http://' + data
 
         return super().run_validation(data=data)
 

src/backend/InvenTree/InvenTree/settings.py

@@ -1095,6 +1095,7 @@ IMPORT_EXPORT_USE_TRANSACTIONS = True
 SITE_URL = get_setting('INVENTREE_SITE_URL', 'site_url', None)
 
 if SITE_URL:
+    SITE_URL = str(SITE_URL).strip().rstrip('/')
     logger.info('Using Site URL: %s', SITE_URL)
 
     # Check that the site URL is valid

src/backend/InvenTree/InvenTree/tests.py

@@ -434,17 +434,27 @@ class ValidatorTest(TestCase):
             link='www.google.com',
         )
 
+        # Check that a blank URL is acceptable
+        Part.objects.create(
+            name=f'Part {n + 1}', description='Missing link', category=cat, link=''
+        )
+
         # With strict URL validation
         InvenTreeSetting.set_setting('INVENTREE_STRICT_URLS', True, None)
 
         with self.assertRaises(ValidationError):
             Part.objects.create(
-                name=f'Part {n + 1}',
+                name=f'Part {n + 2}',
                 description='Link without schema',
                 category=cat,
                 link='www.google.com',
             )
 
+        # Check that a blank URL is acceptable
+        Part.objects.create(
+            name=f'Part {n + 3}', description='Missing link', category=cat, link=''
+        )
+
 
 class FormatTest(TestCase):
     """Unit tests for custom string formatting functionality."""

src/backend/InvenTree/InvenTree/validators.py

@@ -65,7 +65,10 @@ class AllowedURLValidator(validators.URLValidator):
         # Determine if 'strict' URL validation is required (i.e. if the URL must have a schema prefix)
         strict_urls = get_global_setting('INVENTREE_STRICT_URLS', cache=False)
 
-        if not strict_urls:
+        if value is not None:
+            value = str(value).strip()
+
+        if value and not strict_urls:
             # Allow URLs which do not have a provided schema
             if '://' not in value:
                 # Validate as if it were http

src/backend/InvenTree/InvenTree/version.py

@@ -18,7 +18,7 @@ from django.conf import settings
 from .api_version import INVENTREE_API_TEXT, INVENTREE_API_VERSION
 
 # InvenTree software version
-INVENTREE_SW_VERSION = '0.17.10'
+INVENTREE_SW_VERSION = '0.17.12'
 
 
 logger = logging.getLogger('inventree')

src/backend/InvenTree/part/migrations/0111_auto_20230521_1350.py

@@ -84,6 +84,8 @@ def migrate_part_units(apps, schema_editor):
 
 class Migration(migrations.Migration):
 
+    atomic = False
+
     dependencies = [
         ('part', '0110_alter_part_units'),
     ]

src/backend/InvenTree/plugin/base/integration/ScheduleMixin.py

@@ -179,7 +179,15 @@ class ScheduleMixin:
                     obj['func'] = 'plugin.registry.call_plugin_function'
                     obj['args'] = f"'{slug}', '{func_name}'"
 
-                if Schedule.objects.filter(name=task_name).exists():
+                tasks = Schedule.objects.filter(name=task_name)
+                if len(tasks) > 1:
+                    logger.info(
+                        "Found multiple tasks; Adding a new scheduled task '%s'",
+                        task_name,
+                    )
+                    tasks.delete()
+                    Schedule.objects.create(**obj)
+                elif len(tasks) == 1:
                     # Scheduled task already exists - update it!
                     logger.info("Updating scheduled task '%s'", task_name)
                     instance = Schedule.objects.get(name=task_name)

src/backend/InvenTree/plugin/base/integration/test_mixins.py

@@ -209,7 +209,11 @@ class APICallMixinTest(BaseMixinDefinition, TestCase):
             NAME = 'Sample API Caller'
 
             SETTINGS = {
-                'API_TOKEN': {'name': 'API Token', 'protected': True},
+                'API_TOKEN': {
+                    'name': 'API Token',
+                    'protected': True,
+                    'default': 'reqres-free-v1',
+                },
                 'API_URL': {
                     'name': 'External URL',
                     'description': 'Where is your API located?',
@@ -219,6 +223,7 @@ class APICallMixinTest(BaseMixinDefinition, TestCase):
 
             API_URL_SETTING = 'API_URL'
             API_TOKEN_SETTING = 'API_TOKEN'
+            API_TOKEN = 'x-api-key'
 
             @property
             def api_url(self):
@@ -289,6 +294,8 @@ class APICallMixinTest(BaseMixinDefinition, TestCase):
         self.assertTrue(result)
         self.assertEqual(result.reason, 'OK')
 
+        # Set API TOKEN
+        self.mixin.set_setting('API_TOKEN', 'reqres-free-v1')
         # api_call with post and data
         result = self.mixin.api_call(
             'https://reqres.in/api/users/',
@@ -298,6 +305,7 @@ class APICallMixinTest(BaseMixinDefinition, TestCase):
         )
 
         self.assertTrue(result)
+        self.assertNotIn('error', result)
         self.assertEqual(result['name'], 'morpheus')
 
         # api_call with endpoint with leading slash

src/backend/InvenTree/plugin/samples/integration/api_caller.py

@@ -10,7 +10,11 @@ class SampleApiCallerPlugin(APICallMixin, SettingsMixin, InvenTreePlugin):
     NAME = 'Sample API Caller'
 
     SETTINGS = {
-        'API_TOKEN': {'name': 'API Token', 'protected': True},
+        'API_TOKEN': {
+            'name': 'API Token',
+            'protected': True,
+            'default': 'reqres-free-v1',
+        },
         'API_URL': {
             'name': 'External URL',
             'description': 'Where is your API located?',
@@ -19,6 +23,7 @@ class SampleApiCallerPlugin(APICallMixin, SettingsMixin, InvenTreePlugin):
     }
     API_URL_SETTING = 'API_URL'
     API_TOKEN_SETTING = 'API_TOKEN'
+    API_TOKEN = 'x-api-key'
 
     def get_external_url(self):
         """Returns data from the sample endpoint."""

src/backend/InvenTree/plugin/samples/integration/test_scheduled_task.py

@@ -2,10 +2,10 @@
 
 from django.test import TestCase
 
-from plugin import InvenTreePlugin, registry
+from plugin import InvenTreePlugin
 from plugin.helpers import MixinImplementationError
 from plugin.mixins import ScheduleMixin
-from plugin.registry import call_plugin_function
+from plugin.registry import call_plugin_function, registry
 
 
 class ExampleScheduledTaskPluginTests(TestCase):
@@ -42,9 +42,19 @@ class ExampleScheduledTaskPluginTests(TestCase):
         # test updating the schedule
         hello_schedule = Schedule.objects.get(name='plugin.schedule.hello')
         self.assertEqual(hello_schedule.minutes, 45)
-        # change the schedule and reregister
+        # change the schedule and reregister -> the interval should be preserved
         plg.scheduled_tasks['hello']['minutes'] = 15
+        # add a doubly scheduled task - this should be removed
+        Schedule.objects.create(name='plugin.schedule.hello')
+        self.assertEqual(
+            Schedule.objects.filter(name='plugin.schedule.hello').count(), 2
+        )
+
         plg.register_tasks()
+        # The duplicate task should be removed
+        self.assertEqual(
+            Schedule.objects.filter(name='plugin.schedule.hello').count(), 1
+        )
 
         # Check that the schedule was updated
         hello_schedule = Schedule.objects.get(name='plugin.schedule.hello')