diff --git a/src/main/java/com/googlesource/gerrit/plugins/its/jira/JiraClient.java b/src/main/java/com/googlesource/gerrit/plugins/its/jira/JiraClient.java
index 897d7aa..ae2a864 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/its/jira/JiraClient.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/its/jira/JiraClient.java
@@ -67,7 +67,7 @@
   public boolean issueExists(String issueKey) throws IOException {
     JiraRestApi<JiraIssue> api = apiBuilder.getIssue();
 
-    api.doGet("/" + issueKey, HTTP_OK, new int[] {HTTP_NOT_FOUND, HTTP_FORBIDDEN});
+    api.doGet(issueKey, HTTP_OK, new int[] {HTTP_NOT_FOUND, HTTP_FORBIDDEN});
     Integer code = api.getResponseCode();
     switch (code) {
       case HTTP_OK:
@@ -92,7 +92,7 @@
   public List<JiraTransition.Item> getTransitions(String issueKey) throws IOException {
 
     JiraRestApi<JiraTransition> api = apiBuilder.get(JiraTransition.class, "/issue");
-    return Arrays.asList(api.doGet("/" + issueKey + "/transitions", HTTP_OK).getTransitions());
+    return Arrays.asList(api.doGet(issueKey + "/transitions", HTTP_OK).getTransitions());
   }
 
   /**
@@ -106,7 +106,7 @@
       log.debug("Trying to add comment for issue {}", issueKey);
       apiBuilder
           .getIssue()
-          .doPost("/" + issueKey + "/comment", gson.toJson(new JiraComment(comment)), HTTP_CREATED);
+          .doPost(issueKey + "/comment", gson.toJson(new JiraComment(comment)), HTTP_CREATED);
       log.debug("Comment added to issue {}", issueKey);
     } else {
       log.error("Issue {} does not exist or no access permission", issueKey);
@@ -129,8 +129,7 @@
     log.debug("Transition issue {} to '{}' ({})", issueKey, transition, t.getId());
     return apiBuilder
         .getIssue()
-        .doPost(
-            "/" + issueKey + "/transitions", gson.toJson(new JiraTransition(t)), HTTP_NO_CONTENT);
+        .doPost(issueKey + "/transitions", gson.toJson(new JiraTransition(t)), HTTP_NO_CONTENT);
   }
 
   /** @return Serverinformation of jira */
diff --git a/src/main/java/com/googlesource/gerrit/plugins/its/jira/restapi/JiraRestApi.java b/src/main/java/com/googlesource/gerrit/plugins/its/jira/restapi/JiraRestApi.java
index 9d7589d..aff8428 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/its/jira/restapi/JiraRestApi.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/its/jira/restapi/JiraRestApi.java
@@ -48,7 +48,7 @@
   JiraRestApi(URL url, String user, String pass, Class<T> classOfT, String classPrefix)
       throws MalformedURLException {
     this.auth = Base64.getEncoder().encodeToString((user + ":" + pass).getBytes());
-    this.baseUrl = new URL(url, BASE_PREFIX + classPrefix);
+    this.baseUrl = new URL(url, BASE_PREFIX + classPrefix + "/");
     this.gson = new Gson();
     this.classOfT = classOfT;
   }