diff --git a/datamodel/low/2.0/definitions_test.go b/datamodel/low/2.0/definitions_test.go
new file mode 100644
index 0000000..5d35893
--- /dev/null
+++ b/datamodel/low/2.0/definitions_test.go
@@ -0,0 +1,88 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+package v2
+
+import (
+	"github.com/pb33f/libopenapi/datamodel/low"
+	"github.com/pb33f/libopenapi/index"
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+	"testing"
+)
+
+func TestDefinitions_Schemas_Build_Error(t *testing.T) {
+
+	yml := `gonna:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n Definitions
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
+
+func TestDefinitions_Parameters_Build_Error(t *testing.T) {
+
+	yml := `gonna:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n ParameterDefinitions
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
+
+func TestDefinitions_Responses_Build_Error(t *testing.T) {
+
+	yml := `gonna:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n ResponsesDefinitions
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
+
+func TestDefinitions_Security_Build_Error(t *testing.T) {
+
+	yml := `gonna:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n SecurityDefinitions
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
diff --git a/datamodel/low/2.0/header_test.go b/datamodel/low/2.0/header_test.go
new file mode 100644
index 0000000..c7d8156
--- /dev/null
+++ b/datamodel/low/2.0/header_test.go
@@ -0,0 +1,31 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+package v2
+
+import (
+	"github.com/pb33f/libopenapi/datamodel/low"
+	"github.com/pb33f/libopenapi/index"
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+	"testing"
+)
+
+func TestHeader_Build(t *testing.T) {
+
+	yml := `items:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n Header
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
diff --git a/datamodel/low/2.0/items_test.go b/datamodel/low/2.0/items_test.go
new file mode 100644
index 0000000..5e56e74
--- /dev/null
+++ b/datamodel/low/2.0/items_test.go
@@ -0,0 +1,30 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+package v2
+
+import (
+	"github.com/pb33f/libopenapi/datamodel/low"
+	"github.com/pb33f/libopenapi/index"
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+	"testing"
+)
+
+func TestItems_Build(t *testing.T) {
+
+	yml := `items:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n Items
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+}
diff --git a/datamodel/low/2.0/operation_test.go b/datamodel/low/2.0/operation_test.go
new file mode 100644
index 0000000..868934a
--- /dev/null
+++ b/datamodel/low/2.0/operation_test.go
@@ -0,0 +1,88 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+package v2
+
+import (
+	"github.com/pb33f/libopenapi/datamodel/low"
+	"github.com/pb33f/libopenapi/index"
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+	"testing"
+)
+
+func TestOperation_Build_ExternalDocs(t *testing.T) {
+
+	yml := `externalDocs:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n Operation
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
+
+func TestOperation_Build_Params(t *testing.T) {
+
+	yml := `parameters:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n Operation
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
+
+func TestOperation_Build_Responses(t *testing.T) {
+
+	yml := `responses:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n Operation
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
+
+func TestOperation_Build_Security(t *testing.T) {
+
+	yml := `security:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n Operation
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
diff --git a/datamodel/low/2.0/path_item_test.go b/datamodel/low/2.0/path_item_test.go
new file mode 100644
index 0000000..7a99a7c
--- /dev/null
+++ b/datamodel/low/2.0/path_item_test.go
@@ -0,0 +1,50 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+package v2
+
+import (
+	"github.com/pb33f/libopenapi/datamodel/low"
+	"github.com/pb33f/libopenapi/index"
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+	"testing"
+)
+
+func TestPathItem_Build_Params(t *testing.T) {
+
+	yml := `parameters:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n PathItem
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
+
+func TestPathItem_Build_MethodFail(t *testing.T) {
+
+	yml := `post:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n PathItem
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
diff --git a/datamodel/low/2.0/paths_test.go b/datamodel/low/2.0/paths_test.go
new file mode 100644
index 0000000..a314ad3
--- /dev/null
+++ b/datamodel/low/2.0/paths_test.go
@@ -0,0 +1,31 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+package v2
+
+import (
+	"github.com/pb33f/libopenapi/datamodel/low"
+	"github.com/pb33f/libopenapi/index"
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+	"testing"
+)
+
+func TestPaths_Build(t *testing.T) {
+
+	yml := `"/fresh/code":
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n Paths
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
diff --git a/datamodel/low/2.0/response_test.go b/datamodel/low/2.0/response_test.go
new file mode 100644
index 0000000..50d66ea
--- /dev/null
+++ b/datamodel/low/2.0/response_test.go
@@ -0,0 +1,69 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+package v2
+
+import (
+	"github.com/pb33f/libopenapi/datamodel/low"
+	"github.com/pb33f/libopenapi/index"
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+	"testing"
+)
+
+func TestResponse_Build_Schema(t *testing.T) {
+
+	yml := `schema:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n Response
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
+
+func TestResponse_Build_Examples(t *testing.T) {
+
+	yml := `examples:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n Response
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
+
+func TestResponse_Build_Headers(t *testing.T) {
+
+	yml := `headers:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n Response
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
diff --git a/datamodel/low/2.0/responses_test.go b/datamodel/low/2.0/responses_test.go
new file mode 100644
index 0000000..306b5db
--- /dev/null
+++ b/datamodel/low/2.0/responses_test.go
@@ -0,0 +1,67 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+package v2
+
+import (
+	"github.com/pb33f/libopenapi/datamodel/low"
+	"github.com/pb33f/libopenapi/index"
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+	"testing"
+)
+
+func TestResponses_Build_Response(t *testing.T) {
+
+	yml := `$ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n Responses
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
+
+func TestResponses_Build_Response_Default(t *testing.T) {
+
+	yml := `default:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n Responses
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
+
+func TestResponses_Build_WrongType(t *testing.T) {
+
+	yml := `- $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n Responses
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
diff --git a/datamodel/low/2.0/security_scheme_test.go b/datamodel/low/2.0/security_scheme_test.go
new file mode 100644
index 0000000..0d63ab6
--- /dev/null
+++ b/datamodel/low/2.0/security_scheme_test.go
@@ -0,0 +1,31 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+package v2
+
+import (
+	"github.com/pb33f/libopenapi/datamodel/low"
+	"github.com/pb33f/libopenapi/index"
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+	"testing"
+)
+
+func TestSecurityScheme_Build(t *testing.T) {
+
+	yml := `scopes:
+  $ref: break`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n SecurityScheme
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.Error(t, err)
+
+}
diff --git a/datamodel/low/2.0/swagger.go b/datamodel/low/2.0/swagger.go
index 6849264..49ad139 100644
--- a/datamodel/low/2.0/swagger.go
+++ b/datamodel/low/2.0/swagger.go
@@ -52,10 +52,7 @@ func CreateDocument(info *datamodel.SpecInfo) (*Swagger, []error) {
 	var errors []error
 
 	// build out swagger scalar variables.
-	bErr := low.BuildModel(info.RootNode, &doc)
-	if bErr != nil {
-		errors = append(errors, bErr)
-	}
+	_ = low.BuildModel(info.RootNode, &doc)
 
 	// extract externalDocs
 	extDocs, err := low.ExtractObject[*base.ExternalDoc](base.ExternalDocsLabel, info.RootNode, idx)
diff --git a/datamodel/low/2.0/swagger_test.go b/datamodel/low/2.0/swagger_test.go
index 4caea35..bb912b9 100644
--- a/datamodel/low/2.0/swagger_test.go
+++ b/datamodel/low/2.0/swagger_test.go
@@ -4,153 +4,328 @@
 package v2
 
 import (
-    "fmt"
-    "github.com/pb33f/libopenapi/datamodel"
-    "github.com/stretchr/testify/assert"
-    "io/ioutil"
-    "testing"
+	"fmt"
+	"github.com/pb33f/libopenapi/datamodel"
+	"github.com/stretchr/testify/assert"
+	"io/ioutil"
+	"testing"
 )
 
 var doc *Swagger
 
 func initTest() {
-    if doc != nil {
-        return
-    }
-    data, _ := ioutil.ReadFile("../../../test_specs/petstorev2-complete.yaml")
-    info, _ := datamodel.ExtractSpecInfo(data)
-    var err []error
-    doc, err = CreateDocument(info)
-    wait := true
-    for wait {
-        select {
-        case <-info.JsonParsingChannel:
-            wait = false
-        }
-    }
-    if err != nil {
-        fmt.Print(err)
-        panic(err)
-    }
+	if doc != nil {
+		return
+	}
+	data, _ := ioutil.ReadFile("../../../test_specs/petstorev2-complete.yaml")
+	info, _ := datamodel.ExtractSpecInfo(data)
+	var err []error
+	doc, err = CreateDocument(info)
+	wait := true
+	for wait {
+		select {
+		case <-info.JsonParsingChannel:
+			wait = false
+		}
+	}
+	if err != nil {
+		fmt.Print(err)
+		panic(err)
+	}
 }
 
 func BenchmarkCreateDocument(b *testing.B) {
-    data, _ := ioutil.ReadFile("../../../test_specs/petstorev2-complete.yaml")
-    info, _ := datamodel.ExtractSpecInfo(data)
-    for i := 0; i < b.N; i++ {
-        doc, _ = CreateDocument(info)
-    }
+	data, _ := ioutil.ReadFile("../../../test_specs/petstorev2-complete.yaml")
+	info, _ := datamodel.ExtractSpecInfo(data)
+	for i := 0; i < b.N; i++ {
+		doc, _ = CreateDocument(info)
+	}
 }
 
 func TestCreateDocument(t *testing.T) {
-    initTest()
-    assert.Equal(t, "2.0", doc.SpecInfo.Version)
-    assert.Equal(t, "1.0.6", doc.Info.Value.Version.Value)
-    assert.Equal(t, "petstore.swagger.io", doc.Host.Value)
-    assert.Equal(t, "/v2", doc.BasePath.Value)
-    assert.Len(t, doc.Parameters.Value.Definitions, 1)
-    assert.Len(t, doc.Tags.Value, 3)
-    assert.Len(t, doc.Schemes.Value, 2)
-    assert.Len(t, doc.Definitions.Value.Schemas, 6)
-    assert.Len(t, doc.SecurityDefinitions.Value.Definitions, 2)
-    assert.Len(t, doc.Paths.Value.PathItems, 15)
-    assert.Len(t, doc.Responses.Value.Definitions, 2)
-    assert.Equal(t, "http://swagger.io", doc.ExternalDocs.Value.URL.Value)
-    assert.Equal(t, true, doc.FindExtension("x-pet").Value)
-    assert.Equal(t, true, doc.FindExtension("X-Pet").Value)
+	initTest()
+	assert.Equal(t, "2.0", doc.SpecInfo.Version)
+	assert.Equal(t, "1.0.6", doc.Info.Value.Version.Value)
+	assert.Equal(t, "petstore.swagger.io", doc.Host.Value)
+	assert.Equal(t, "/v2", doc.BasePath.Value)
+	assert.Len(t, doc.Parameters.Value.Definitions, 1)
+	assert.Len(t, doc.Tags.Value, 3)
+	assert.Len(t, doc.Schemes.Value, 2)
+	assert.Len(t, doc.Definitions.Value.Schemas, 6)
+	assert.Len(t, doc.SecurityDefinitions.Value.Definitions, 2)
+	assert.Len(t, doc.Paths.Value.PathItems, 15)
+	assert.Len(t, doc.Responses.Value.Definitions, 2)
+	assert.Equal(t, "http://swagger.io", doc.ExternalDocs.Value.URL.Value)
+	assert.Equal(t, true, doc.FindExtension("x-pet").Value)
+	assert.Equal(t, true, doc.FindExtension("X-Pet").Value)
 }
 
 func TestCreateDocument_Info(t *testing.T) {
-    initTest()
-    assert.Equal(t, "Swagger Petstore", doc.Info.Value.Title.Value)
-    assert.Equal(t, "apiteam@swagger.io", doc.Info.Value.Contact.Value.Email.Value)
-    assert.Equal(t, "Apache 2.0", doc.Info.Value.License.Value.Name.Value)
+	initTest()
+	assert.Equal(t, "Swagger Petstore", doc.Info.Value.Title.Value)
+	assert.Equal(t, "apiteam@swagger.io", doc.Info.Value.Contact.Value.Email.Value)
+	assert.Equal(t, "Apache 2.0", doc.Info.Value.License.Value.Name.Value)
 }
 
 func TestCreateDocument_Parameters(t *testing.T) {
-    initTest()
-    simpleParam := doc.Parameters.Value.FindParameter("simpleParam")
-    assert.NotNil(t, simpleParam)
-    assert.Equal(t, "simple", simpleParam.Value.Name.Value)
-    assert.Equal(t, "nuggets", simpleParam.Value.FindExtension("x-chicken").Value)
+	initTest()
+	simpleParam := doc.Parameters.Value.FindParameter("simpleParam")
+	assert.NotNil(t, simpleParam)
+	assert.Equal(t, "simple", simpleParam.Value.Name.Value)
+	assert.Equal(t, "nuggets", simpleParam.Value.FindExtension("x-chicken").Value)
 
 }
 
 func TestCreateDocument_Tags(t *testing.T) {
-    initTest()
-    assert.Equal(t, "pet", doc.Tags.Value[0].Value.Name.Value)
-    assert.Equal(t, "http://swagger.io", doc.Tags.Value[0].Value.ExternalDocs.Value.URL.Value)
-    assert.Equal(t, "store", doc.Tags.Value[1].Value.Name.Value)
-    assert.Equal(t, "user", doc.Tags.Value[2].Value.Name.Value)
-    assert.Equal(t, "http://swagger.io", doc.Tags.Value[2].Value.ExternalDocs.Value.URL.Value)
+	initTest()
+	assert.Equal(t, "pet", doc.Tags.Value[0].Value.Name.Value)
+	assert.Equal(t, "http://swagger.io", doc.Tags.Value[0].Value.ExternalDocs.Value.URL.Value)
+	assert.Equal(t, "store", doc.Tags.Value[1].Value.Name.Value)
+	assert.Equal(t, "user", doc.Tags.Value[2].Value.Name.Value)
+	assert.Equal(t, "http://swagger.io", doc.Tags.Value[2].Value.ExternalDocs.Value.URL.Value)
 }
 
 func TestCreateDocument_SecurityDefinitions(t *testing.T) {
-    initTest()
-    apiKey := doc.SecurityDefinitions.Value.FindSecurityDefinition("api_key")
-    assert.Equal(t, "apiKey", apiKey.Value.Type.Value)
-    petStoreAuth := doc.SecurityDefinitions.Value.FindSecurityDefinition("petstore_auth")
-    assert.Equal(t, "oauth2", petStoreAuth.Value.Type.Value)
-    assert.Equal(t, "implicit", petStoreAuth.Value.Flow.Value)
-    assert.Len(t, petStoreAuth.Value.Scopes.Value.Values, 2)
-    assert.Equal(t, "read your pets", petStoreAuth.Value.Scopes.Value.FindScope("read:pets").Value)
+	initTest()
+	apiKey := doc.SecurityDefinitions.Value.FindSecurityDefinition("api_key")
+	assert.Equal(t, "apiKey", apiKey.Value.Type.Value)
+	petStoreAuth := doc.SecurityDefinitions.Value.FindSecurityDefinition("petstore_auth")
+	assert.Equal(t, "oauth2", petStoreAuth.Value.Type.Value)
+	assert.Equal(t, "implicit", petStoreAuth.Value.Flow.Value)
+	assert.Len(t, petStoreAuth.Value.Scopes.Value.Values, 2)
+	assert.Equal(t, "read your pets", petStoreAuth.Value.Scopes.Value.FindScope("read:pets").Value)
 }
 
 func TestCreateDocument_Definitions(t *testing.T) {
-    initTest()
-    apiResp := doc.Definitions.Value.FindSchema("ApiResponse").Value.Schema()
-    assert.NotNil(t, apiResp)
-    assert.Len(t, apiResp.Properties.Value, 3)
-    assert.Equal(t, "integer", apiResp.FindProperty("code").Value.Schema().Type.Value)
+	initTest()
+	apiResp := doc.Definitions.Value.FindSchema("ApiResponse").Value.Schema()
+	assert.NotNil(t, apiResp)
+	assert.Len(t, apiResp.Properties.Value, 3)
+	assert.Equal(t, "integer", apiResp.FindProperty("code").Value.Schema().Type.Value)
 
-    pet := doc.Definitions.Value.FindSchema("Pet").Value.Schema()
-    assert.NotNil(t, pet)
-    assert.Len(t, pet.Required.Value, 2)
+	pet := doc.Definitions.Value.FindSchema("Pet").Value.Schema()
+	assert.NotNil(t, pet)
+	assert.Len(t, pet.Required.Value, 2)
 
-    // perform a deep inline lookup on a schema to ensure chains work
-    assert.Equal(t, "Category", pet.FindProperty("category").Value.Schema().XML.Value.Name.Value)
+	// perform a deep inline lookup on a schema to ensure chains work
+	assert.Equal(t, "Category", pet.FindProperty("category").Value.Schema().XML.Value.Name.Value)
 
-    // check enums
-    assert.Len(t, pet.FindProperty("status").Value.Schema().Enum.Value, 3)
+	// check enums
+	assert.Len(t, pet.FindProperty("status").Value.Schema().Enum.Value, 3)
 }
 
 func TestCreateDocument_ResponseDefinitions(t *testing.T) {
-    initTest()
-    apiResp := doc.Responses.Value.FindResponse("200")
-    assert.NotNil(t, apiResp)
-    assert.Equal(t, "OK", apiResp.Value.Description.Value)
-    assert.Equal(t, "morning", apiResp.Value.FindExtension("x-coffee").Value)
+	initTest()
+	apiResp := doc.Responses.Value.FindResponse("200")
+	assert.NotNil(t, apiResp)
+	assert.Equal(t, "OK", apiResp.Value.Description.Value)
+	assert.Equal(t, "morning", apiResp.Value.FindExtension("x-coffee").Value)
 
-    header := apiResp.Value.FindHeader("noHeader")
-    assert.NotNil(t, header)
-    assert.True(t, header.Value.FindExtension("x-empty").Value.(bool))
+	header := apiResp.Value.FindHeader("noHeader")
+	assert.NotNil(t, header)
+	assert.True(t, header.Value.FindExtension("x-empty").Value.(bool))
 
-    header = apiResp.Value.FindHeader("myHeader")
-    if k, ok := header.Value.Items.Value.Default.Value.(map[string]interface{}); ok {
-        assert.Equal(t, "here", k["something"])
-    } else {
-        panic("should not fail.")
-    }
-    if k, ok := header.Value.Items.Value.Items.Value.Default.Value.([]interface{}); ok {
-        assert.Len(t, k, 2)
-        assert.Equal(t, "two", k[1])
-    } else {
-        panic("should not fail.")
-    }
+	header = apiResp.Value.FindHeader("myHeader")
+	if k, ok := header.Value.Items.Value.Default.Value.(map[string]interface{}); ok {
+		assert.Equal(t, "here", k["something"])
+	} else {
+		panic("should not fail.")
+	}
+	if k, ok := header.Value.Items.Value.Items.Value.Default.Value.([]interface{}); ok {
+		assert.Len(t, k, 2)
+		assert.Equal(t, "two", k[1])
+	} else {
+		panic("should not fail.")
+	}
 
-    header = apiResp.Value.FindHeader("yourHeader")
-    assert.Equal(t, "somethingSimple", header.Value.Items.Value.Default.Value)
+	header = apiResp.Value.FindHeader("yourHeader")
+	assert.Equal(t, "somethingSimple", header.Value.Items.Value.Default.Value)
 }
 
 func TestCreateDocument_Paths(t *testing.T) {
-    initTest()
-    uploadImage := doc.Paths.Value.FindPath("/pet/{petId}/uploadImage").Value
-    assert.NotNil(t, uploadImage)
-    assert.Nil(t, doc.Paths.Value.FindPath("/nothing-nowhere-nohow"))
-    assert.Equal(t, "man", uploadImage.FindExtension("x-potato").Value)
-    assert.Equal(t, "fresh", doc.Paths.Value.FindExtension("x-minty").Value)
-    assert.Equal(t, "successful operation",
-        uploadImage.Post.Value.Responses.Value.FindResponseByCode("200").Value.Description.Value)
+	initTest()
+	uploadImage := doc.Paths.Value.FindPath("/pet/{petId}/uploadImage").Value
+	assert.NotNil(t, uploadImage)
+	assert.Nil(t, doc.Paths.Value.FindPath("/nothing-nowhere-nohow"))
+	assert.Equal(t, "man", uploadImage.FindExtension("x-potato").Value)
+	assert.Equal(t, "fresh", doc.Paths.Value.FindExtension("x-minty").Value)
+	assert.Equal(t, "successful operation",
+		uploadImage.Post.Value.Responses.Value.FindResponseByCode("200").Value.Description.Value)
 
 }
 
+func TestCreateDocument_Bad(t *testing.T) {
+
+	yml := `swagger:
+  $ref: bork`
+
+	info, err := datamodel.ExtractSpecInfo([]byte(yml))
+	assert.Nil(t, info)
+	assert.Error(t, err)
+}
+
+func TestCreateDocument_ExternalDocsBad(t *testing.T) {
+
+	yml := `externalDocs:
+  $ref: bork`
+
+	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
+	var err []error
+	doc, err = CreateDocument(info)
+	wait := true
+	for wait {
+		select {
+		case <-info.JsonParsingChannel:
+			wait = false
+		}
+	}
+	assert.Len(t, err, 1)
+}
+
+func TestCreateDocument_TagsBad(t *testing.T) {
+
+	yml := `tags:
+  $ref: bork`
+
+	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
+	var err []error
+	doc, err = CreateDocument(info)
+	wait := true
+	for wait {
+		select {
+		case <-info.JsonParsingChannel:
+			wait = false
+		}
+	}
+	assert.Len(t, err, 1)
+}
+
+func TestCreateDocument_PathsBad(t *testing.T) {
+
+	yml := `paths:
+  "/hey":
+    post:
+      responses:
+        "200":
+          $ref: bork`
+
+	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
+	var err []error
+	doc, err = CreateDocument(info)
+	wait := true
+	for wait {
+		select {
+		case <-info.JsonParsingChannel:
+			wait = false
+		}
+	}
+	assert.Len(t, err, 1)
+}
+
+func TestCreateDocument_SecurityBad(t *testing.T) {
+
+	yml := `security:
+  $ref: `
+
+	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
+	var err []error
+	doc, err = CreateDocument(info)
+	wait := true
+	for wait {
+		select {
+		case <-info.JsonParsingChannel:
+			wait = false
+		}
+	}
+	assert.Len(t, err, 1)
+}
+
+func TestCreateDocument_SecurityDefinitionsBad(t *testing.T) {
+
+	yml := `securityDefinitions:
+  $ref: `
+
+	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
+	var err []error
+	doc, err = CreateDocument(info)
+	wait := true
+	for wait {
+		select {
+		case <-info.JsonParsingChannel:
+			wait = false
+		}
+	}
+	assert.Len(t, err, 1)
+}
+
+func TestCreateDocument_ResponsesBad(t *testing.T) {
+
+	yml := `responses:
+  $ref: `
+
+	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
+	var err []error
+	doc, err = CreateDocument(info)
+	wait := true
+	for wait {
+		select {
+		case <-info.JsonParsingChannel:
+			wait = false
+		}
+	}
+	assert.Len(t, err, 1)
+}
+
+func TestCreateDocument_ParametersBad(t *testing.T) {
+
+	yml := `parameters:
+  $ref: `
+
+	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
+	var err []error
+	doc, err = CreateDocument(info)
+	wait := true
+	for wait {
+		select {
+		case <-info.JsonParsingChannel:
+			wait = false
+		}
+	}
+	assert.Len(t, err, 1)
+}
+
+func TestCreateDocument_DefinitionsBad(t *testing.T) {
+
+	yml := `definitions:
+  $ref: `
+
+	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
+	var err []error
+	doc, err = CreateDocument(info)
+	wait := true
+	for wait {
+		select {
+		case <-info.JsonParsingChannel:
+			wait = false
+		}
+	}
+	assert.Len(t, err, 1)
+}
+
+func TestCreateDocument_InfoBad(t *testing.T) {
+
+	yml := `info:
+  $ref: `
+
+	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
+	var err []error
+	doc, err = CreateDocument(info)
+	wait := true
+	for wait {
+		select {
+		case <-info.JsonParsingChannel:
+			wait = false
+		}
+	}
+	assert.Len(t, err, 1)
+}
diff --git a/datamodel/model_utils.go b/datamodel/model_utils.go
index cce4a0f..5cbd7a7 100644
--- a/datamodel/model_utils.go
+++ b/datamodel/model_utils.go
@@ -91,7 +91,10 @@ func ExtractSpecInfo(spec []byte) (*SpecInfo, error) {
 	// check for specific keys
 	if openAPI3 != nil {
 		specVersion.SpecType = utils.OpenApi3
-		version, majorVersion := parseVersionTypeData(openAPI3.Value)
+		version, majorVersion, versionError := parseVersionTypeData(openAPI3.Value)
+		if versionError != nil {
+			return nil, versionError
+		}
 
 		// parse JSON
 		go parseJSON(spec, specVersion)
@@ -106,7 +109,10 @@ func ExtractSpecInfo(spec []byte) (*SpecInfo, error) {
 	}
 	if openAPI2 != nil {
 		specVersion.SpecType = utils.OpenApi2
-		version, majorVersion := parseVersionTypeData(openAPI2.Value)
+		version, majorVersion, versionError := parseVersionTypeData(openAPI2.Value)
+		if versionError != nil {
+			return nil, versionError
+		}
 
 		// parse JSON
 		go parseJSON(spec, specVersion)
@@ -121,7 +127,10 @@ func ExtractSpecInfo(spec []byte) (*SpecInfo, error) {
 	}
 	if asyncAPI != nil {
 		specVersion.SpecType = utils.AsyncApi
-		version, majorVersion := parseVersionTypeData(asyncAPI.Value)
+		version, majorVersion, versionErr := parseVersionTypeData(asyncAPI.Value)
+		if versionErr != nil {
+			return nil, versionErr
+		}
 
 		// parse JSON
 		go parseJSON(spec, specVersion)
@@ -148,9 +157,12 @@ func ExtractSpecInfo(spec []byte) (*SpecInfo, error) {
 	return specVersion, nil
 }
 
-func parseVersionTypeData(d interface{}) (string, int) {
+func parseVersionTypeData(d interface{}) (string, int, error) {
 	r := []rune(strings.TrimSpace(fmt.Sprintf("%v", d)))
-	return string(r), int(r[0]) - '0'
+	if len(r) <= 0 {
+		return "", 0, fmt.Errorf("unable to extract version from: %v", d)
+	}
+	return string(r), int(r[0]) - '0', nil
 }
 
 // AreValuesCorrectlyTyped will look through an array of unknown values and check they match