diff --git a/tests/schema/helpers.go b/tests/schema/helpers.go
index 0d2d676f..90d83492 100644
--- a/tests/schema/helpers.go
+++ b/tests/schema/helpers.go
@@ -68,7 +68,7 @@ func loadTestCasesInternal(t *testing.T, errors bool, parts ...string) []TestCas
 		if !entry.IsDir() && strings.HasSuffix(entry.Name(), ".yaml") {
 			var errorsArray []string
 			if errors {
-				errorsArray = readErrors(t, filepath.Join(dir, entry.Name()+".errors"))
+				errorsArray = readErrors(t, filepath.Join(dir, path+".errors"))
 			}
 
 			testCases = append(testCases, TestCase{
diff --git a/tests/schema/invalid/mocks/fake/minimal.yaml b/tests/schema/invalid/mocks/fake/minimal.yaml
new file mode 100644
index 00000000..83df219d
--- /dev/null
+++ b/tests/schema/invalid/mocks/fake/minimal.yaml
@@ -0,0 +1,18 @@
+mappings:
+  - from: http://localhost
+    to: https://github.com
+    mocks:
+      - path: /path-to-mock
+        response:
+          code: 200
+          fake:
+            type: object
+            property:
+              first-name:
+                type: firstname
+              last-name:
+                type: lastname
+              about:
+                type: sentence
+                options:
+                  wordcount: 15
\ No newline at end of file
diff --git a/tests/schema/invalid/mocks/fake/minimal.yaml.errors b/tests/schema/invalid/mocks/fake/minimal.yaml.errors
new file mode 100644
index 00000000..3e6e0a46
--- /dev/null
+++ b/tests/schema/invalid/mocks/fake/minimal.yaml.errors
@@ -0,0 +1,4 @@
+mappings.0: Must validate one and only one schema (oneOf)
+mappings.0.mocks.0.response: Must validate one and only one schema (oneOf)
+mappings.0.mocks.0.response.fake: Must validate one and only one schema (oneOf)
+mappings.0.mocks.0.response.fake: Additional property property is not allowed
\ No newline at end of file
diff --git a/tests/schema/invalid/mocks/file/minimal.yaml b/tests/schema/invalid/mocks/file/minimal.yaml
new file mode 100644
index 00000000..09194817
--- /dev/null
+++ b/tests/schema/invalid/mocks/file/minimal.yaml
@@ -0,0 +1,8 @@
+mappings:
+  - from: http://localhost
+    to: https://github.com
+    mocks:
+      - path: /path-to-mock
+        response:
+          code: 99
+          file: /path/to/file.json
\ No newline at end of file
diff --git a/tests/schema/invalid/mocks/file/minimal.yaml.errors b/tests/schema/invalid/mocks/file/minimal.yaml.errors
new file mode 100644
index 00000000..1a7054d1
--- /dev/null
+++ b/tests/schema/invalid/mocks/file/minimal.yaml.errors
@@ -0,0 +1,3 @@
+mappings.0: Must validate one and only one schema (oneOf)
+mappings.0.mocks.0.response: Must validate one and only one schema (oneOf)
+mappings.0.mocks.0.response.code: Must be greater than or equal to 100
\ No newline at end of file
diff --git a/tests/schema/invalid/mocks/raw/minimal.yaml b/tests/schema/invalid/mocks/raw/minimal.yaml
new file mode 100644
index 00000000..05dcf2a4
--- /dev/null
+++ b/tests/schema/invalid/mocks/raw/minimal.yaml
@@ -0,0 +1,7 @@
+mappings:
+  - from: http://localhost
+    to: https://github.com
+    mocks:
+      - path: /path-to-mock
+        response:
+          raw: "Hello, World!"
\ No newline at end of file
diff --git a/tests/schema/invalid/mocks/raw/minimal.yaml.errors b/tests/schema/invalid/mocks/raw/minimal.yaml.errors
new file mode 100644
index 00000000..0866dcc8
--- /dev/null
+++ b/tests/schema/invalid/mocks/raw/minimal.yaml.errors
@@ -0,0 +1,3 @@
+mappings.0: Must validate one and only one schema (oneOf)
+mappings.0.mocks.0.response: Must validate one and only one schema (oneOf)
+mappings.0.mocks.0.response: code is required
\ No newline at end of file
diff --git a/tools/schema/fakedata.go b/tools/schema/fakedata.go
index bc532f1d..ddca8e6d 100644
--- a/tools/schema/fakedata.go
+++ b/tools/schema/fakedata.go
@@ -1,11 +1,12 @@
 package main
 
 import (
+	"sort"
+
 	"github.com/Jeffail/gabs"
 	"github.com/brianvoe/gofakeit/v7"
 	"github.com/evg4b/uncors/pkg/fakedata"
 	"github.com/samber/lo"
-	"sort"
 )
 
 func generateFakeDataNodes() []*gabs.Container {