diff --git a/interfaces/k8s_backup_target/ruff.toml b/interfaces/k8s_backup_target/ruff.toml
index efbd8c5cc..79b043b3f 100644
--- a/interfaces/k8s_backup_target/ruff.toml
+++ b/interfaces/k8s_backup_target/ruff.toml
@@ -9,10 +9,3 @@ quote-style = "preserve"
     "D",  # docs
     "E501",  # line too long
 ]
-"./interface/v*/tests/*.py" = [
-    "CPY",  # copyright
-    "D",  # docs
-    "S",  # security
-    "E501",  # line too long
-    "F841",  # assignment to unused variable
-]
diff --git a/interfaces/k8s_backup_target/src/charmlibs/interfaces/k8s_backup_target/_schema.py b/interfaces/k8s_backup_target/src/charmlibs/interfaces/k8s_backup_target/_schema.py
index ab4161c2b..a537992ed 100644
--- a/interfaces/k8s_backup_target/src/charmlibs/interfaces/k8s_backup_target/_schema.py
+++ b/interfaces/k8s_backup_target/src/charmlibs/interfaces/k8s_backup_target/_schema.py
@@ -128,3 +128,8 @@ class ProviderAppData(BaseModel):
         description="List of backup target entries.",
         title="Backup Targets",
     )
+
+
+ProviderUnitData = None
+RequirerAppData = None
+RequirerUnitData = None
diff --git a/interfaces/velero_backup_config/interface/v0/interface.yaml b/interfaces/velero_backup_config/interface/v0/interface.yaml
index ae7d5f3d7..0166b9399 100644
--- a/interfaces/velero_backup_config/interface/v0/interface.yaml
+++ b/interfaces/velero_backup_config/interface/v0/interface.yaml
@@ -14,23 +14,11 @@ providers:
   - name: mlmd-operator
     url: https://github.com/canonical/mlmd-operator
     branch: main
-    test_setup:
-      pre_run: "poetry export --without-hashes --with unit --with charm --format=requirements.txt > requirements.txt"
-      location: tests/interface_tests/conftest.py
-      identifier: interface_tester
   - name: minio-operator
     url: https://github.com/canonical/minio-operator
     branch: main
-    test_setup:
-      pre_run: "poetry export --without-hashes --with unit --with charm --format=requirements.txt > requirements.txt"
-      location: tests/interface_tests/conftest.py
-      identifier: interface_tester
   - name: kubeflow-profiles-operator
     url: https://github.com/canonical/kubeflow-profiles-operator
     branch: main
-    test_setup:
-      pre_run: "poetry export --without-hashes --with unit --with charm --format=requirements.txt > requirements.txt"
-      location: tests/interface_tests/conftest.py
-      identifier: interface_tester
 
 maintainer: analytics
diff --git a/interfaces/velero_backup_config/interface/v0/schema.py b/interfaces/velero_backup_config/interface/v0/schema.py
index 1e0ec270a..b0759940a 100644
--- a/interfaces/velero_backup_config/interface/v0/schema.py
+++ b/interfaces/velero_backup_config/interface/v0/schema.py
@@ -2,7 +2,6 @@
 # See LICENSE file for licensing details.
 
 
-from interface_tester.schema_base import DataBagSchema
 from pydantic import BaseModel, Field
 
 
@@ -87,14 +86,6 @@ class RequirerAppData(BaseModel):
     )
 
 
-class RequirerSchema(DataBagSchema):
-    """Schema for the requirer (client) side of velero-backup-config."""
-
-    app: RequirerAppData
-
-
-class ProviderSchema(DataBagSchema):
-    """Schema for the provider (Velero Operator) side of velero-backup-config."""
-
-    # The provider sends no data, so no app or unit fields are defined.
-    pass
+ProviderAppData = None
+ProviderUnitData = None
+RequirerUnitData = None
diff --git a/interfaces/velero_backup_config/interface/v0/tests/.disable b/interfaces/velero_backup_config/interface/v0/tests/.disable
deleted file mode 100644
index e69de29bb..000000000
diff --git a/interfaces/velero_backup_config/interface/v0/tests/test_provider.py b/interfaces/velero_backup_config/interface/v0/tests/test_provider.py
deleted file mode 100644
index de2f14a7a..000000000
--- a/interfaces/velero_backup_config/interface/v0/tests/test_provider.py
+++ /dev/null
@@ -1,23 +0,0 @@
-# Copyright 2025 Canonical
-# See LICENSE file for licensing details.
-
-from interface_tester import Tester
-from scenario import State
-
-
-def test_data_on_created():
-    t = Tester(State(leader=True))
-    state_out = t.run("velero-backup-config-relation-created")
-    t.assert_schema_valid()
-
-
-def test_data_on_joined():
-    t = Tester(State(leader=True))
-    state_out = t.run("velero-backup-config-relation-joined")
-    t.assert_schema_valid()
-
-
-def test_data_on_changed():
-    t = Tester(State(leader=True))
-    state_out = t.run("velero-backup-config-relation-changed")
-    t.assert_schema_valid()
diff --git a/interfaces/velero_backup_config/ruff.toml b/interfaces/velero_backup_config/ruff.toml
index efbd8c5cc..79b043b3f 100644
--- a/interfaces/velero_backup_config/ruff.toml
+++ b/interfaces/velero_backup_config/ruff.toml
@@ -9,10 +9,3 @@ quote-style = "preserve"
     "D",  # docs
     "E501",  # line too long
 ]
-"./interface/v*/tests/*.py" = [
-    "CPY",  # copyright
-    "D",  # docs
-    "S",  # security
-    "E501",  # line too long
-    "F841",  # assignment to unused variable
-]