diff --git a/CI/circle_parallel.sh b/CI/circle_parallel.sh
index 25bea6eb41e..b8d25329014 100755
--- a/CI/circle_parallel.sh
+++ b/CI/circle_parallel.sh
@@ -81,8 +81,6 @@ else
   export PATH="/usr/local/go1.14/go/bin:$PATH"
   go version
 
-  installDart
-
   mvn --no-snapshot-updates --quiet verify -Psamples.circleci.others -Dorg.slf4j.simpleLogger.defaultLogLevel=error
   mvn --no-snapshot-updates --quiet javadoc:javadoc -Psamples.circleci -Dorg.slf4j.simpleLogger.defaultLogLevel=error
 fi
diff --git a/pom.xml b/pom.xml
index 30babe9a972..3d2ab30975f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1352,17 +1352,6 @@
                 <module>samples/client/petstore/javascript-promise-es6</module>
                 <module>samples/server/petstore/go-api-server</module>
                 <module>samples/server/petstore/go-gin-api-server</module>
-                <module>samples/client/petstore/dart2/petstore_client_lib</module>
-                <module>samples/client/petstore/dart2/petstore</module>
-                <module>samples/openapi3/client/petstore/dart2/petstore_client_lib</module>
-                <module>samples/openapi3/client/petstore/dart2/petstore</module>
-<!--                <module>samples/openapi3/client/petstore/dart2/petstore_json_serializable_client_lib_fake</module>-->
-                <module>samples/client/petstore/dart-dio/petstore_client_lib</module>
-                <module>samples/openapi3/client/petstore/dart-dio/petstore_client_lib</module>
-                <module>samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake</module>
-                <module>samples/openapi3/client/petstore/dart-dio-next/petstore_client_lib_fake</module>
-                <module>samples/client/petstore/dart-jaguar/openapi</module>
-                <module>samples/client/petstore/dart-jaguar/flutter_petstore/openapi</module>
             </modules>
         </profile>
         <!-- test with JDK9 in Shippable CI -->
@@ -1424,6 +1413,14 @@
             </activation>
             <modules>
                 <!-- clients -->
+                <module>samples/openapi3/client/petstore/dart2/petstore_client_lib</module>
+                <module>samples/openapi3/client/petstore/dart2/petstore</module>
+                <module>samples/openapi3/client/petstore/dart-dio/petstore_client_lib</module>
+                <module>samples/openapi3/client/petstore/dart-dio/petstore_client_lib_fake</module>
+                <module>samples/openapi3/client/petstore/dart-dio-next/petstore_client_lib_fake</module>
+                <module>samples/client/petstore/dart-jaguar/openapi</module>
+                <module>samples/client/petstore/dart-jaguar/flutter_petstore/openapi</module>
+                <!--<module>samples/openapi3/client/petstore/dart2/petstore_json_serializable_client_lib_fake</module>-->
                 <module>samples/client/petstore/R</module>
                 <!--<module>samples/client/petstore/haskell-http-client</module>-->
                 <!-- servers -->