diff --git a/Jenkinsfile b/Jenkinsfile
index f31546d..a293c4e 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -15,21 +15,24 @@ pipeline {
                     //def implementations = sh(script: 'docker run retropikzel1/compile-r7rs:chibi sh -c "compile-r7rs --list-r7rs-schemes"', returnStdout: true).split()
                     def implementations = "chibi chicken gauche guile kawa mosh racket sagittarius stklos ypsilon".split()
 
-                    implementations.each { implementation->
-                        stage("${implementation} install") {
-                            catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-                                sh "docker build --build-arg SCHEME=${implementation} --tag=r7rs-pffi-test-${implementation} -f dockerfiles/Dockerfile.snow-chibi-install-test ."
-                                sh "docker run -v ${WORKSPACE}:/workdir -w /workdir -t r7rs-pffi-test-${implementation} sh -c \"make clean package install-jenkins SCHEME=${implementation} && cp tests/hello.scm /tmp/ && cd /tmp && SCHEME=${implementation} compile-r7rs -o hello hello.scm && ./hello\""
-                            }
-                        }
-                        tests.each { test ->
-                            stage("${implementation} ${test}") {
-                                catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-                                    sh "docker build --build-arg SCHEME=${implementation} --tag=r7rs-pffi-test-${implementation} -f dockerfiles/Dockerfile.test ."
-                                    sh "docker run -v ${WORKSPACE}:/workdir -w /workdir -t r7rs-pffi-test-${implementation} sh -c \"make SCHEME=${implementation} TEST=${test} clean test\""
+                    parallel implementations.collectEntries { implementation->
+                        [(implementation): {
+                                stage("${implementation} install") {
+                                    catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
+                                        sh "docker build --build-arg SCHEME=${implementation} --tag=r7rs-pffi-test-${implementation} -f dockerfiles/Dockerfile.snow-chibi-install-test ."
+                                        sh "docker run -v ${WORKSPACE}:/workdir -w /workdir -t r7rs-pffi-test-${implementation} sh -c \"make clean package install-jenkins SCHEME=${implementation} && cp tests/hello.scm /tmp/ && cd /tmp && SCHEME=${implementation} compile-r7rs -o hello hello.scm && ./hello\""
+                                    }
+                                }
+                                tests.each { test ->
+                                    stage("${implementation} ${test}") {
+                                        catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
+                                            sh "docker build --build-arg SCHEME=${implementation} --tag=r7rs-pffi-test-${implementation} -f dockerfiles/Dockerfile.test ."
+                                            sh "docker run -v ${WORKSPACE}:/workdir -w /workdir -t r7rs-pffi-test-${implementation} sh -c \"make SCHEME=${implementation} TEST=${test} clean test\""
+                                        }
+                                    }
                                 }
                             }
-                        }
+                        ]
                     }
                 }
             }