diff --git a/native/request/testdata/README.md b/native/request/testdata/README.md
new file mode 100644
index 0000000..520f5d7
--- /dev/null
+++ b/native/request/testdata/README.md
@@ -0,0 +1,6 @@
+# Testdata
+
+JSON examples copied from [OpenRTB](https://www.iab.com/guidelines/real-time-bidding-rtb-project/) [Dynamic Native Ads API
+Specification Version 1.1](https://www.iab.com/wp-content/uploads/2016/03/OpenRTB-Native-Ads-Specification-1-1_2016.pdf) spec - section 6 Bid Request/Response Samples.
+
+Some empty/zero attributes were omited (not copied) because of [encoding/json](https://golang.org/pkg/encoding/json/) `omitempty` and [gomega.MatchJSON(...)](http://onsi.github.io/gomega/#matchjsonjson-interface).
diff --git a/native/response/testdata/README.md b/native/response/testdata/README.md
new file mode 100644
index 0000000..520f5d7
--- /dev/null
+++ b/native/response/testdata/README.md
@@ -0,0 +1,6 @@
+# Testdata
+
+JSON examples copied from [OpenRTB](https://www.iab.com/guidelines/real-time-bidding-rtb-project/) [Dynamic Native Ads API
+Specification Version 1.1](https://www.iab.com/wp-content/uploads/2016/03/OpenRTB-Native-Ads-Specification-1-1_2016.pdf) spec - section 6 Bid Request/Response Samples.
+
+Some empty/zero attributes were omited (not copied) because of [encoding/json](https://golang.org/pkg/encoding/json/) `omitempty` and [gomega.MatchJSON(...)](http://onsi.github.io/gomega/#matchjsonjson-interface).
diff --git a/testdata/README.md b/testdata/README.md
index 6a5356b..e45fe40 100644
--- a/testdata/README.md
+++ b/testdata/README.md
@@ -1,5 +1,5 @@
 # Testdata
 
-JSON examples copied from [OpenRTB](//www.iab.com/guidelines/real-time-bidding-rtb-project/) [v2.5](//www.iab.com/wp-content/uploads/2016/03/OpenRTB-API-Specification-Version-2-5-FINAL.pdf) spec - section 6. Bid Request/Response Samples.
+JSON examples copied from [OpenRTB](https://www.iab.com/guidelines/real-time-bidding-rtb-project/) [v2.5](https://www.iab.com/wp-content/uploads/2016/03/OpenRTB-API-Specification-Version-2-5-FINAL.pdf) spec - section 6. Bid Request/Response Samples.
 
-Some empty/zero attributes were omited (not copied) because of [encoding/json](//golang.org/pkg/encoding/json/) `omitempty` and [gomega.MatchJSON(...)](//onsi.github.io/gomega/#matchjsonjson-interface).
+Some empty/zero attributes were omited (not copied) because of [encoding/json](https://golang.org/pkg/encoding/json/) `omitempty` and [gomega.MatchJSON(...)](http://onsi.github.io/gomega/#matchjsonjson-interface).