diff --git a/Jenkinsfile b/Jenkinsfile
index 852bbee..9ff04a4 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -67,7 +67,7 @@ pipeline {
                     sh 'find . -name "*.o" -delete'
                     sh 'find . -name "*.o" -delete'
                     
-                    sh 'chibi-scheme -I ./snow/chibi r7rs-tests.scm'
+                    sh 'chibi-scheme -I ./snow/chibi r7rs-tests.scm> r7rs-test.log'
                     sh 'for f in *.log; do cp -- "$f" "reports/chibi-$f"; done'
                     sh 'ls reports'
                     stash name: 'reports', includes: 'reports/*'
@@ -99,7 +99,7 @@ pipeline {
                     sh 'find . -name "*.o" -delete'
                     sh 'find . -name "*.o" -delete'
                     sh ' ls  && cp snow/chibi/term/ansi.sld snow.chibi.term.ansi.sld && csc -include-path ./snow/chibi -include-path ./snow/chibi/term -X r7rs -R r7rs -s -J snow.chibi.term.ansi.sld && cp snow/chibi/optional.sld snow.chibi.optional.sld && csc -include-path ./snow/chibi -include-path ./snow/chibi/term -X r7rs -R r7rs -s -J snow.chibi.optional.sld && cp snow/chibi/diff.sld snow.chibi.diff.sld && csc -include-path ./snow/chibi -include-path ./snow/chibi/term -X r7rs -R r7rs -s -J snow.chibi.diff.sld && cp snow/chibi/test.sld snow.chibi.test.sld && csc -include-path ./snow/chibi -include-path ./snow/chibi/term -X r7rs -R r7rs -s -J snow.chibi.test.sld'
-                    sh 'csc -include-path ./snow/chibi -X r7rs -R r7rs r7rs-tests.scm && ./r7rs-test && rm r7rs-test'
+                    sh 'csc -include-path ./snow/chibi -X r7rs -R r7rs r7rs-tests.scm && ./r7rs-test && rm r7rs-test> r7rs-test.log'
                     sh 'for f in *.log; do cp -- "$f" "reports/chicken-$f"; done'
                     sh 'ls reports'
                     stash name: 'reports', includes: 'reports/*'
@@ -131,7 +131,7 @@ pipeline {
                     sh 'find . -name "*.o" -delete'
                     sh 'find . -name "*.o" -delete'
                     sh ' ls  && cyclone -A . snow/chibi/term/ansi.sld && cyclone -A . snow/chibi/optional.sld && cyclone -A . snow/chibi/diff.sld && cyclone -A . snow/chibi/test.sld'
-                    sh 'cyclone -A . r7rs-tests.scm && ./r7rs-test && rm r7rs-test'
+                    sh 'cyclone -A . r7rs-tests.scm && ./r7rs-test && rm r7rs-test> r7rs-test.log'
                     sh 'for f in *.log; do cp -- "$f" "reports/cyclone-$f"; done'
                     sh 'ls reports'
                     stash name: 'reports', includes: 'reports/*'
@@ -163,7 +163,7 @@ pipeline {
                     sh 'find . -name "*.o" -delete'
                     sh 'find . -name "*.o" -delete'
                     sh ' ls  && gsc . snow/chibi/term/ansi && gsc . snow/chibi/optional && gsc . snow/chibi/diff && gsc . snow/chibi/test'
-                    sh 'gsc -exe . -nopreload r7rs-tests.scm && ./r7rs-test && rm r7rs-test'
+                    sh 'gsc -exe . -nopreload r7rs-tests.scm && ./r7rs-test && rm r7rs-test> r7rs-test.log'
                     sh 'for f in *.log; do cp -- "$f" "reports/gambit-$f"; done'
                     sh 'ls reports'
                     stash name: 'reports', includes: 'reports/*'
@@ -195,7 +195,7 @@ pipeline {
                     sh 'find . -name "*.o" -delete'
                     sh 'find . -name "*.o" -delete'
                     
-                    sh 'gosh -r7 -A ./snow r7rs-tests.scm'
+                    sh 'gosh -r7 -A ./snow r7rs-tests.scm> r7rs-test.log'
                     sh 'for f in *.log; do cp -- "$f" "reports/gauche-$f"; done'
                     sh 'ls reports'
                     stash name: 'reports', includes: 'reports/*'
@@ -227,7 +227,7 @@ pipeline {
                     sh 'find . -name "*.o" -delete'
                     sh 'find . -name "*.o" -delete'
                     
-                    sh 'guile --fresh-auto-compile --r7rs -L . -L ./snow r7rs-tests.scm'
+                    sh 'guile --fresh-auto-compile --r7rs -L . -L ./snow r7rs-tests.scm> r7rs-test.log'
                     sh 'for f in *.log; do cp -- "$f" "reports/guile-$f"; done'
                     sh 'ls reports'
                     stash name: 'reports', includes: 'reports/*'
@@ -259,7 +259,7 @@ pipeline {
                     sh 'find . -name "*.o" -delete'
                     sh 'find . -name "*.o" -delete'
                     
-                    sh 'kawa --r7rs -Dkawa.import.path=./snow/chibi/*.sld:./snow/srfi/*.sld r7rs-tests.scm'
+                    sh 'kawa --r7rs -Dkawa.import.path=./snow/chibi/*.sld:./snow/srfi/*.sld r7rs-tests.scm> r7rs-test.log'
                     sh 'for f in *.log; do cp -- "$f" "reports/kawa-$f"; done'
                     sh 'ls reports'
                     stash name: 'reports', includes: 'reports/*'
@@ -291,7 +291,7 @@ pipeline {
                     sh 'find . -name "*.o" -delete'
                     sh 'find . -name "*.o" -delete'
                     sh ' ls  && ls snow/chibi/term/ansi.sld && ls snow/chibi/optional.sld && ls snow/chibi/diff.sld && ls snow/chibi/test.sld'
-                    sh 'LOKO_LIBRARY_PATH=./snow loko -std=r7rs --compile r7rs-tests.scm && ./r7rs-test && rm r7rs-test'
+                    sh 'LOKO_LIBRARY_PATH=./snow loko -std=r7rs --compile r7rs-tests.scm && ./r7rs-test && rm r7rs-test> r7rs-test.log'
                     sh 'for f in *.log; do cp -- "$f" "reports/loko-$f"; done'
                     sh 'ls reports'
                     stash name: 'reports', includes: 'reports/*'
@@ -323,7 +323,7 @@ pipeline {
                     sh 'find . -name "*.o" -delete'
                     sh 'find . -name "*.o" -delete'
                     
-                    sh 'mit-scheme --load r7rs-tests.scm'
+                    sh 'mit-scheme --load r7rs-tests.scm> r7rs-test.log'
                     sh 'for f in *.log; do cp -- "$f" "reports/mit-scheme-$f"; done'
                     sh 'ls reports'
                     stash name: 'reports', includes: 'reports/*'
@@ -355,7 +355,7 @@ pipeline {
                     sh 'find . -name "*.o" -delete'
                     sh 'find . -name "*.o" -delete'
                     
-                    sh 'sash -r7 -L ./snow r7rs-tests.scm > r7rs-test.log && cat r7rs-test.log'
+                    sh 'sash -r7 -L ./snow r7rs-tests.scm > r7rs-test.log && cat r7rs-test.log> r7rs-test.log'
                     sh 'for f in *.log; do cp -- "$f" "reports/sagittarius-$f"; done'
                     sh 'ls reports'
                     stash name: 'reports', includes: 'reports/*'
@@ -387,7 +387,7 @@ pipeline {
                     sh 'find . -name "*.o" -delete'
                     sh 'find . -name "*.o" -delete'
                     
-                    sh 'stklos -I ./snow r7rs-tests.scm'
+                    sh 'stklos -I ./snow r7rs-tests.scm> r7rs-test.log'
                     sh 'for f in *.log; do cp -- "$f" "reports/stklos-$f"; done'
                     sh 'ls reports'
                     stash name: 'reports', includes: 'reports/*'
@@ -419,7 +419,7 @@ pipeline {
                     sh 'find . -name "*.o" -delete'
                     sh 'find . -name "*.o" -delete'
                     
-                    sh 'skint --program r7rs-tests.scm'
+                    sh 'skint --program r7rs-tests.scm> r7rs-test.log'
                     sh 'for f in *.log; do cp -- "$f" "reports/skint-$f"; done'
                     sh 'ls reports'
                     stash name: 'reports', includes: 'reports/*'
@@ -451,7 +451,7 @@ pipeline {
                     sh 'find . -name "*.o" -delete'
                     sh 'find . -name "*.o" -delete'
                     
-                    sh 'tr7i r7rs-tests.scm'
+                    sh 'tr7i r7rs-tests.scm> r7rs-test.log'
                     sh 'for f in *.log; do cp -- "$f" "reports/tr7-$f"; done'
                     sh 'ls reports'
                     stash name: 'reports', includes: 'reports/*'
diff --git a/build.scm b/build.scm
index e9c5538..6710639 100644
--- a/build.scm
+++ b/build.scm
@@ -78,7 +78,8 @@
           (for-each
             (lambda (test)
               (execute jenkinsfile-job
-                       `((command . ,(full-command implementation test))
+                       `((command . ,(string-append (full-command implementation test)
+                                                    "> " (cdr (assoc 'name test)) ".log"))
                          (library-command . ,(full-library-command implementation test)))
                        out))
             tests)