diff --git a/application_test.go b/application_test.go
index 219e463..977c5d2 100644
--- a/application_test.go
+++ b/application_test.go
@@ -59,6 +59,26 @@ func TestApplication_LoadCode(t *testing.T) {
 	require.Len(t, sctx.app.Responses, 11)
 }
 
+func TestApplication_DebugLogging(t *testing.T) {
+	// Exercises the debugLogf code path with Debug: true.
+	_, err := Run(&Options{
+		Packages:   []string{"./goparsing/petstore/..."},
+		WorkDir:    "fixtures",
+		ScanModels: true,
+		Debug:      true,
+	})
+	require.NoError(t, err)
+}
+
+func TestRun_InvalidWorkDir(t *testing.T) {
+	// Exercises the Run() error path when package loading fails.
+	_, err := Run(&Options{
+		Packages: []string{"./..."},
+		WorkDir:  "/nonexistent/directory",
+	})
+	require.Error(t, err)
+}
+
 func TestAppScanner_NewSpec(t *testing.T) {
 	doc, err := Run(&Options{
 		Packages: []string{"./goparsing/petstore/..."},
diff --git a/fixtures/goparsing/classification/operations/noparams.go b/fixtures/goparsing/classification/operations/noparams.go
index 0c546ec..e703f30 100644
--- a/fixtures/goparsing/classification/operations/noparams.go
+++ b/fixtures/goparsing/classification/operations/noparams.go
@@ -226,6 +226,18 @@ type NoParams struct {
 	// in: query
 	BarSlice [][][]string `json:"bar_slice"`
 
+	// a NumSlice has numeric items with item-level validation
+	//
+	// min items: 1
+	// max items: 20
+	// items.minimum: 5
+	// items.maximum: 100
+	// items.multiple of: 5
+	// items.unique: true
+	// items.collection format: csv
+	// in: query
+	NumSlice []int32 `json:"num_slice"`
+
 	// the items for this order
 	//
 	// in: body
diff --git a/fixtures/goparsing/go123/special/special_types.go b/fixtures/goparsing/go123/special/special_types.go
index 919939a..32be1e7 100644
--- a/fixtures/goparsing/go123/special/special_types.go
+++ b/fixtures/goparsing/go123/special/special_types.go
@@ -63,6 +63,7 @@ type SpecialTypes struct {
 	PtrFormatUUID          *strfmt.UUID
 	Err                    error
 	Map                    map[string]*GoStruct
+	NamedArray             GoArray
 
 	// and what not
 	WhatNot struct {
diff --git a/parameters_test.go b/parameters_test.go
index 1297f57..ea4691a 100644
--- a/parameters_test.go
+++ b/parameters_test.go
@@ -181,7 +181,7 @@ func assertSomeOperationParams(t *testing.T, operations map[string]*spec.Operati
 	t.Helper()
 	op, okParam := operations["someOperation"]
 	assert.TrueT(t, okParam)
-	assert.Len(t, op.Parameters, 12)
+	assert.Len(t, op.Parameters, 13)
 
 	for _, param := range op.Parameters {
 		switch param.Name {
@@ -215,6 +215,8 @@ func assertSomeOperationParams(t *testing.T, operations map[string]*spec.Operati
 			assert.FalseT(t, param.ExclusiveMinimum)
 			assert.EqualValues(t, 2, param.Default, "%s default value is incorrect", param.Name)
 			assert.EqualValues(t, 27, param.Example)
+			require.NotNil(t, param.MultipleOf)
+			assert.InDeltaT(t, 3.00, *param.MultipleOf, epsilon)
 
 		case paramHdrName:
 			assert.EqualT(t, "Name of this no model instance", param.Description)
@@ -368,6 +370,26 @@ func assertSomeOperationParams(t *testing.T, operations map[string]*spec.Operati
 			assert.EqualT(t, int64(10), *itprop3.MaxLength, "'bar_slice.items.items.items.maxLength' should have been 10")
 			assert.EqualT(t, "\\w+", itprop3.Pattern, "'bar_slice.items.items.items.pattern' should have \\w+")
 
+		case "num_slice":
+			assert.EqualT(t, "a NumSlice has numeric items with item-level validation", param.Description)
+			assert.EqualT(t, "query", param.In)
+			assert.EqualT(t, "array", param.Type)
+			require.NotNil(t, param.MinItems)
+			assert.EqualT(t, int64(1), *param.MinItems)
+			require.NotNil(t, param.MaxItems)
+			assert.EqualT(t, int64(20), *param.MaxItems)
+
+			itprop := param.Items
+			require.NotNil(t, itprop)
+			require.NotNil(t, itprop.Minimum)
+			assert.InDeltaT(t, 5.00, *itprop.Minimum, epsilon, "'num_slice.items.minimum' should have been 5")
+			require.NotNil(t, itprop.Maximum)
+			assert.InDeltaT(t, 100.00, *itprop.Maximum, epsilon, "'num_slice.items.maximum' should have been 100")
+			require.NotNil(t, itprop.MultipleOf)
+			assert.InDeltaT(t, 5.00, *itprop.MultipleOf, epsilon, "'num_slice.items.multipleOf' should have been 5")
+			assert.TrueT(t, itprop.UniqueItems, "'num_slice.items' should have been unique")
+			assert.EqualT(t, "csv", itprop.CollectionFormat, "'num_slice.items.collectionFormat' should have been csv")
+
 		default:
 			assert.Fail(t, "unknown property: "+param.Name)
 		}
@@ -379,7 +401,7 @@ func assertAnotherOperationParamOrder(t *testing.T, operations map[string]*spec.
 
 	order, ok := operations["anotherOperation"]
 	assert.TrueT(t, ok)
-	assert.Len(t, order.Parameters, 12)
+	assert.Len(t, order.Parameters, 13)
 
 	for index, param := range order.Parameters {
 		switch param.Name {
@@ -405,8 +427,10 @@ func assertAnotherOperationParamOrder(t *testing.T, operations map[string]*spec.
 			assert.EqualT(t, 9, index, "%s index incorrect", param.Name)
 		case paramBarSlice:
 			assert.EqualT(t, 10, index, "%s index incorrect", param.Name)
-		case "items":
+		case "num_slice":
 			assert.EqualT(t, 11, index, "%s index incorrect", param.Name)
+		case "items":
+			assert.EqualT(t, 12, index, "%s index incorrect", param.Name)
 		default:
 			assert.Fail(t, "unknown property: "+param.Name)
 		}
diff --git a/parser.go b/parser.go
index 92b269b..a9109b5 100644
--- a/parser.go
+++ b/parser.go
@@ -721,7 +721,7 @@ func (sm *setMultipleOf) Parse(lines []string) error {
 		return nil
 	}
 	matches := sm.rx.FindStringSubmatch(lines[0])
-	if len(matches) > 2 && len(matches[1]) > 0 {
+	if len(matches) > 1 && len(matches[1]) > 0 {
 		multipleOf, err := strconv.ParseFloat(matches[1], 64)
 		if err != nil {
 			return err
diff --git a/responses_test.go b/responses_test.go
index 1a53a0c..8d23860 100644
--- a/responses_test.go
+++ b/responses_test.go
@@ -158,6 +158,8 @@ func assertSomeResponseHeaders(t *testing.T, responses map[string]spec.Response)
 			assert.InDeltaT(t, 3.00, *header.Minimum, epsilon)
 			assert.FalseT(t, header.ExclusiveMinimum)
 			assert.EqualValues(t, 27, header.Example)
+			require.NotNil(t, header.MultipleOf, "'score' should have had a multipleOf")
+			assert.InDeltaT(t, 3.00, *header.MultipleOf, epsilon, "'score' should have had multipleOf 3")
 
 		case "x-hdr-name":
 			assert.EqualT(t, "Name of this some response instance", header.Description)
diff --git a/schema_test.go b/schema_test.go
index 68de053..4d52589 100644
--- a/schema_test.go
+++ b/schema_test.go
@@ -161,6 +161,8 @@ func TestSchemaBuilder(t *testing.T) {
 	assert.InDeltaT(t, 3.00, *prop.Minimum, epsilon)
 	assert.FalseT(t, prop.ExclusiveMinimum, "'score' should not have had an exclusive minimum")
 	assert.EqualValues(t, 27, prop.Example)
+	require.NotNil(t, prop.MultipleOf, "'score' should have had a multipleOf")
+	assert.InDeltaT(t, 3.00, *prop.MultipleOf, epsilon, "'score' should have had multipleOf 3")
 
 	expectedNameExtensions := spec.Extensions{
 		"x-go-name": "Name",
@@ -1765,6 +1767,12 @@ func testSpecialTypesStruct(t *testing.T, sp *spec.Swagger) {
 			assertIsRef(t, mapSchema, "#/definitions/GoStruct")
 		})
 
+		t.Run("a property which is a named array type should render as a ref", func(t *testing.T) {
+			na, ok := props["NamedArray"]
+			require.TrueT(t, ok)
+			assertIsRef(t, &na, "#/definitions/go_array")
+		})
+
 		testSpecialTypesWhatNot(t, sp, props)
 	})
 }