diff --git a/test/route_relation_mapping.json b/test/route_relation_mapping.json
deleted file mode 100644
index c81fc92..0000000
--- a/test/route_relation_mapping.json
+++ /dev/null
@@ -1,128 +0,0 @@
-{
-    "tags": {
-        "load_all": true,
-        "exclude": [
-            "created_by",
-            "source"
-        ]
-    },
-    "tables": {
-        "route_members": {
-            "fields": [
-                {
-                    "type": "id",
-                    "name": "osm_id"
-                },
-                {
-                    "type": "string",
-                    "name": "ref",
-                    "key": "ref"
-                },
-                {
-                    "type": "relation_member_id",
-                    "name": "member"
-                },
-                {
-                    "type": "relation_member_index",
-                    "name": "index"
-                },
-                {
-                    "type": "relation_member_role",
-                    "name": "role"
-                },
-                {
-                    "type": "relation_member_type",
-                    "name": "type"
-                },
-                {
-                    "type": "geometry",
-                    "name": "geometry"
-                },
-                {
-                    "type": "string",
-                    "name": "name",
-                    "key": "name",
-                    "from_members": true
-                }
-            ],
-            "type": "relation_member",
-            "mapping": {
-                "route": [
-                    "bus",
-                    "tram",
-                    "rail"
-                ]
-            }
-        },
-        "routes": {
-            "fields": [
-                {
-                    "type": "id",
-                    "name": "osm_id"
-                },
-                {
-                    "type": "string",
-                    "name": "ref",
-                    "key": "ref"
-                },
-                {
-                    "type": "hstore_tags",
-                    "name": "tags"
-                }
-            ],
-            "type": "relation",
-            "mapping": {
-                "route": [
-                    "bus",
-                    "tram",
-                    "rail"
-                ]
-            }
-        },
-        "master_routes": {
-            "fields": [
-                {
-                    "type": "id",
-                    "name": "osm_id"
-                },
-                {
-                    "type": "relation_member_id",
-                    "name": "member"
-                },
-                {
-                    "type": "relation_member_index",
-                    "name": "index"
-                },
-                {
-                    "type": "relation_member_role",
-                    "name": "role"
-                },
-                {
-                    "type": "relation_member_type",
-                    "name": "type"
-                },
-                {
-                    "type": "geometry",
-                    "name": "geometry"
-                },
-                {
-                    "type": "string",
-                    "name": "subname",
-                    "key": "name",
-                    "from_members": true
-                },
-                {
-                    "type": "string",
-                    "name": "name",
-                    "key": "name"
-                }
-            ],
-            "type": "relation_member",
-            "mapping": {
-                "route_master": [
-                    "bus"
-                ]
-            }
-        }
-    }
-}
diff --git a/test/route_relation_mapping.yml b/test/route_relation_mapping.yml
new file mode 100644
index 0000000..5a09795
--- /dev/null
+++ b/test/route_relation_mapping.yml
@@ -0,0 +1,67 @@
+tags:
+  load_all: true
+  exclude:
+  - created_by
+  - source
+
+tables:
+  master_routes:
+    type: relation_member
+    fields:
+    - name: osm_id
+      type: id
+    - name: member
+      type: relation_member_id
+    - name: index
+      type: relation_member_index
+    - name: role
+      type: relation_member_role
+    - name: type
+      type: relation_member_type
+    - name: geometry
+      type: geometry
+    - name: subname
+      key: name
+      type: string
+      from_members: true
+    - key: name
+      name: name
+      type: string
+    mapping:
+      route_master: [bus]
+  route_members:
+    type: relation_member
+    fields:
+    - name: osm_id
+      type: id
+    - key: ref
+      name: ref
+      type: string
+    - name: member
+      type: relation_member_id
+    - name: index
+      type: relation_member_index
+    - name: role
+      type: relation_member_role
+    - name: type
+      type: relation_member_type
+    - name: geometry
+      type: geometry
+    - name: name
+      key: name
+      type: string
+      from_members: true
+    mapping:
+      route: [bus, tram, rail]
+  routes:
+    type: relation
+    fields:
+    - name: osm_id
+      type: id
+    - key: ref
+      name: ref
+      type: string
+    - name: tags
+      type: hstore_tags
+    mapping:
+      route: [bus, tram, rail]
diff --git a/test/route_relation_test.go b/test/route_relation_test.go
index f71c0af..16b52a0 100644
--- a/test/route_relation_test.go
+++ b/test/route_relation_test.go
@@ -14,7 +14,7 @@ func TestRouteRelation_Prepare(t *testing.T) {
 		connection:      "postgis://",
 		cacheDir:        ts.dir,
 		osmFileName:     "build/route_relation.pbf",
-		mappingFileName: "route_relation_mapping.json",
+		mappingFileName: "route_relation_mapping.yml",
 	}
 	ts.g = geos.NewGeos()