diff --git a/scripts/tests/test_extract_successful_ids.bats b/scripts/tests/test_extract_successful_ids.bats
index 364bedb..caa8dd1 100644
--- a/scripts/tests/test_extract_successful_ids.bats
+++ b/scripts/tests/test_extract_successful_ids.bats
@@ -8,31 +8,31 @@ teardown() {
 }
 
 @test "success downloaded submission" {
-    run ../extract_successful_ids.sh ./example_logfiles/succeed_downloaded_submission.txt
+    run ../extract_successful_ids.sh ./example_logfiles/succeed_downloaded_submission.txt >> ./successful.txt
     assert [ "$( wc -l 'successful.txt' | awk '{ print $1 }' )" -eq "7" ];
     assert [ "$( grep -Ecv '\w{6,7}' 'successful.txt' )" -eq "0" ];
 }
 
 @test "success resource hash" {
-    run ../extract_successful_ids.sh ./example_logfiles/succeed_resource_hash.txt
+    run ../extract_successful_ids.sh ./example_logfiles/succeed_resource_hash.txt >> ./successful.txt
     assert [ "$( wc -l 'successful.txt' | awk '{ print $1 }' )" -eq "1" ];
     assert [ "$( grep -Ecv '\w{6,7}' 'successful.txt' )" -eq "0" ];
 }
 
 @test "success download filter" {
-    run ../extract_successful_ids.sh ./example_logfiles/succeed_download_filter.txt
+    run ../extract_successful_ids.sh ./example_logfiles/succeed_download_filter.txt >> ./successful.txt
     assert [ "$( wc -l 'successful.txt' | awk '{ print $1 }' )" -eq "3" ];
     assert [ "$( grep -Ecv '\w{6,7}' 'successful.txt' )" -eq "0" ];
 }
 
 @test "success already exists" {
-    run ../extract_successful_ids.sh ./example_logfiles/succeed_already_exists.txt
+    run ../extract_successful_ids.sh ./example_logfiles/succeed_already_exists.txt >> ./successful.txt
     assert [ "$( wc -l 'successful.txt' | awk '{ print $1 }' )" -eq "3" ];
     assert [ "$( grep -Ecv '\w{6,7}' 'successful.txt' )" -eq "0" ];
 }
 
 @test "success hard link" {
-    run ../extract_successful_ids.sh ./example_logfiles/succeed_hard_link.txt
+    run ../extract_successful_ids.sh ./example_logfiles/succeed_hard_link.txt >> ./successful.txt
     assert [ "$( wc -l 'successful.txt' | awk '{ print $1 }' )" -eq "1" ];
     assert [ "$( grep -Ecv '\w{6,7}' 'successful.txt' )" -eq "0" ];
 }