diff --git a/Jenkinsfile b/Jenkinsfile
index 834dfa3..11ece57 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -32,17 +32,15 @@ pipeline {
     }
 
     stages {
-        parallel {
-            stage('Test R6RS Debian') {
-                steps {
-                    script {
-                        env.LIBRARIES.split().each { LIBRARY ->
-                            stage("${LIBRARY}") {
-                                env.R6RS_SCHEMES.split().each { SCHEME ->
-                                    stage("${SCHEME}") {
-                                        catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-                                            sh "make SCHEME=${SCHEME} LIBRARY=${LIBRARY} RNRS=r6rs test-docker"
-                                        }
+        stage('Test R6RS Debian') {
+            steps {
+                script {
+                    env.LIBRARIES.split().each { LIBRARY ->
+                        stage("${LIBRARY}") {
+                            env.R6RS_SCHEMES.split().each { SCHEME ->
+                                stage("${SCHEME}") {
+                                    catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
+                                        sh "make SCHEME=${SCHEME} LIBRARY=${LIBRARY} RNRS=r6rs test-docker"
                                     }
                                 }
                             }
@@ -50,16 +48,16 @@ pipeline {
                     }
                 }
             }
-            stage('Test R7RS Debian') {
-                steps {
-                    script {
-                        env.LIBRARIES.split().each { LIBRARY ->
-                            stage("${LIBRARY}") {
-                                env.R7RS_SCHEMES.split().each { SCHEME ->
-                                    stage("${SCHEME}") {
-                                        catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-                                            sh "make SCHEME=${SCHEME} LIBRARY=${LIBRARY} RNRS=r7rs test-docker"
-                                        }
+        }
+        stage('Test R7RS Debian') {
+            steps {
+                script {
+                    env.LIBRARIES.split().each { LIBRARY ->
+                        stage("${LIBRARY}") {
+                            env.R7RS_SCHEMES.split().each { SCHEME ->
+                                stage("${SCHEME}") {
+                                    catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
+                                        sh "make SCHEME=${SCHEME} LIBRARY=${LIBRARY} RNRS=r7rs test-docker"
                                     }
                                 }
                             }