diff --git a/.travis.yml b/.travis.yml
index 676a721..ba9e904 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,8 +9,8 @@ services:
 env:
   # - LIBVIPS=7.42.3
   # - LIBVIPS=8.4.6
-  # - LIBVIPS=8.5.8
-  # - LIBVIPS=8.6.2
+  - LIBVIPS=8.5.8
+  - LIBVIPS=8.6.2
   - LIBVIPS=8.7.4
   # - LIBVIPS=8.8.4
   - LIBVIPS=8.9.2
diff --git a/type.go b/type.go
index ea7ef90..603dddf 100644
--- a/type.go
+++ b/type.go
@@ -6,6 +6,9 @@ import (
 	"unicode/utf8"
 )
 
+// ImageType represents an image type value.
+type ImageType int
+
 const (
 	// UNKNOWN represents an unknow image type value.
 	UNKNOWN ImageType = iota
@@ -29,9 +32,6 @@ const (
 	HEIF
 )
 
-// ImageType represents an image type value.
-type ImageType int
-
 var (
 	htmlCommentRegex = regexp.MustCompile("(?i)<!--([\\s\\S]*?)-->")
 	svgRegex         = regexp.MustCompile(`(?i)^\s*(?:<\?xml[^>]*>\s*)?(?:<!doctype svg[^>]*>\s*)?<svg[^>]*>[^*]*<\/svg>\s*$`)
diff --git a/type_test.go b/type_test.go
index b06e251..48531ea 100644
--- a/type_test.go
+++ b/type_test.go
@@ -53,6 +53,10 @@ func TestDeterminateImageTypeName(t *testing.T) {
 	}
 
 	for _, file := range files {
+		if file.expected == "heif" && VipsMajorVersion <= 8 && VipsMinorVersion < 8 {
+			continue
+		}
+
 		img, _ := os.Open(path.Join("testdata", file.name))
 		buf, _ := ioutil.ReadAll(img)
 		defer img.Close()
@@ -72,6 +76,9 @@ func TestIsTypeSupported(t *testing.T) {
 	}
 
 	for _, n := range types {
+		if n.name == HEIF && VipsMajorVersion <= 8 && VipsMinorVersion < 8 {
+			continue
+		}
 		if IsTypeSupported(n.name) == false {
 			t.Fatalf("Image type %s is not valid", ImageTypes[n.name])
 		}
@@ -92,6 +99,9 @@ func TestIsTypeNameSupported(t *testing.T) {
 	}
 
 	for _, n := range types {
+		if n.name == "heif" && VipsMajorVersion <= 8 && VipsMinorVersion < 8 {
+			continue
+		}
 		if IsTypeNameSupported(n.name) != n.expected {
 			t.Fatalf("Image type %s is not valid", n.name)
 		}