diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c6c1b456..d7168fb4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -149,7 +149,7 @@ push GitLab.com pages branch:
     url: https://gitlab.com/JOSM/plugin/wikipedia/tree/pages/dist
   script:
     - |
-      base64 --decode "$SSH_PRIVATE_DEPLOY_KEY" > ~/.ssh/id_rsa
+      base64 -d "$SSH_PRIVATE_DEPLOY_KEY" > ~/.ssh/id_rsa
       chmod 600 ~/.ssh/id_rsa
       git clone --depth 1 --branch pages git@gitlab.com:JOSM/plugin/wikipedia.git pages
     - |
diff --git a/src/main/java/org/wikipedia/validator/WikipediaValueFormat.java b/src/main/java/org/wikipedia/validator/WikipediaValueFormat.java
index 506c0bf6..d8209b04 100644
--- a/src/main/java/org/wikipedia/validator/WikipediaValueFormat.java
+++ b/src/main/java/org/wikipedia/validator/WikipediaValueFormat.java
@@ -50,9 +50,9 @@ public WikipediaValueFormat() {
 
     @Override
     public void check(OsmPrimitive p) {
-        Optional.ofNullable(p.get(OsmTagConstants.Key.WIKIDATA)).ifPresent(value -> {
-            checkFullUrl(p, OsmTagConstants.Key.WIKIDATA, value);
-            checkLanguageArticleFormat(p, OsmTagConstants.Key.WIKIDATA, value);
+        Optional.of(OsmTagConstants.Key.WIKIPEDIA).flatMap(k -> Optional.ofNullable(p.get(k)).map(v -> new Tag(k, v))).ifPresent(tag -> {
+            checkFullUrl(p, tag.getKey(), tag.getValue());
+            checkLanguageArticleFormat(p, tag.getKey(), tag.getValue());
             // checkUrlDecode() is tested by core
         });
         p.keySet().stream().filter(Objects::nonNull).filter(it -> it.endsWith(":wikipedia")).collect(Collectors.toMap(it -> it, p::get)).forEach((key, value) -> {
diff --git a/test/data/wikipedia-tag-value-format-validation.osm b/test/data/wikipedia-tag-value-format-validation.osm
new file mode 100644
index 00000000..2ed361e4
--- /dev/null
+++ b/test/data/wikipedia-tag-value-format-validation.osm
@@ -0,0 +1,27 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<osm version='0.6' generator='JOSM'>
+  <node id='-1' action='modify' visible='true' lat='0.00000' lon='0.00000'>
+    <tag k='wikipedia' v='http://be-x-old.wikipedia.org/wiki/A' />
+    <tag k='name' v='A' />
+  </node>
+  <node id='-2' action='modify' visible='true' lat='0.00000' lon='0.00001'>
+    <tag k='wikipedia' v='https://be-x-old.wikipedia.org/wiki/B' />
+    <tag k='name' v='B' />
+  </node>
+  <node id='-3' action='modify' visible='true' lat='0.00000' lon='0.00002'>
+    <tag k='wikipedia' v='//be-x-old.wikipedia.org/wiki/C' />
+    <tag k='name' v='C' />
+  </node>
+  <node id='-4' action='modify' visible='true' lat='0.00000' lon='0.00003'>
+    <tag k='wikipedia' v='http://be-x-old.m.wikipedia.org/wiki/D' />
+    <tag k='name' v='D' />
+  </node>
+  <node id='-5' action='modify' visible='true' lat='0.00000' lon='0.00004'>
+    <tag k='wikipedia' v='https://be-x-old.m.wikipedia.org/wiki/E' />
+    <tag k='name' v='E' />
+  </node>
+  <node id='-6' action='modify' visible='true' lat='0.00000' lon='0.00005'>
+    <tag k='wikipedia' v='//be-x-old.m.wikipedia.org/wiki/F' />
+    <tag k='name' v='F' />
+  </node>
+</osm>