diff --git a/regression_test.sh b/regression_test.sh
index 086905e..54c6c38 100755
--- a/regression_test.sh
+++ b/regression_test.sh
@@ -33,34 +33,37 @@ trap 'echo "ABORTING";end;exit' 1 2 15
 echo testing compression from stdin
 ./lrzip -vvlfo lrztest.lrz < $infile
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing compression from stdin
         end
 	exit 1
 fi
+rm lrztest.lrz
 
 echo testing compression to stdout
 ./lrzip -vvlo - $infile > lrztest.lrz
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing compression to stdout
         end
 	exit 1
 fi
 
+rm lrztest.lrz
 echo testing compression from stdin to stdout
 ./lrzip -vvl < $infile > lrztest.lrz
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing compression from stdin to stdout
         end
 	exit 1
 fi
 
+rm lrztest.lrz
 echo testing standard compression
 ./lrzip -vvlfo lrztest.lrz $infile
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing standard compression
         end
 	exit 1
@@ -69,52 +72,57 @@ fi
 echo testing standard decompression
 ./lrzip -vvdo lrztest lrztest.lrz
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest ];then
 	echo FAILED testing standard decompression
         end
 	exit 1
 fi
 
+rm lrztest
 echo testing standard decompression with file checking
 ./lrzip -vvdfco lrztest lrztest.lrz
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest ];then
 	echo FAILED testing standard decompression with file checking
         end
 	exit 1
 fi
 
+rm lrztest
 echo testing decompression from stdin
 ./lrzip -vvfo lrztest -d < lrztest.lrz
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest ];then
 	echo FAILED testing decompression from stdin
         end
 	exit 1
 fi
 
+rm lrztest
 echo testing decompression to stdout
 ./lrzip -vvdo - lrztest.lrz > lrztest
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest ];then
 	echo FAILED testing decompression to stdout
         end
 	exit 1
 fi
 
+rm lrztest
 echo testing decompression from stdin to stdout
 ./lrzip -vvd < lrztest.lrz > lrztest
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest ];then
 	echo FAILED testing decompression from stdin to stdout
         end
 	exit 1
 fi
 
+rm lrztest
 echo testing testing
 ./lrzip -vvt lrztest.lrz
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing testing
         end
 	exit 1
@@ -123,16 +131,17 @@ fi
 echo testing testing from stdin
 ./lrzip -vvt < lrztest.lrz
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing testing from stdin
         end
 	exit 1
 fi
 
+rm lrztest.lrz
 echo testing rzip only compression
 ./lrzip -vvnfo lrztest.lrz $infile
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing rzip only compression
         end
 	exit 1
@@ -141,16 +150,17 @@ fi
 echo testing rzip only testing
 ./lrzip -vvt lrztest.lrz
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing rzip only testing
         end
 	exit 1
 fi
 
+rm lrztest.lrz
 echo testing lzma compression
 ./lrzip -vvfo lrztest.lrz $infile
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing lzma compression
         end
 	exit 1
@@ -159,16 +169,17 @@ fi
 echo testing lzma testing
 ./lrzip -vvt lrztest.lrz
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing lzma testing
         end
 	exit 1
 fi
 
+rm lrztest.lrz
 echo testing gzip compression
 ./lrzip -vvgfo lrztest.lrz $infile
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing gzip compression
         end
 	exit 1
@@ -177,16 +188,17 @@ fi
 echo testing gzip testing
 ./lrzip -vvt lrztest.lrz
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing gzip testing
         end
 	exit 1
 fi
 
+rm lrztest.lrz
 echo testing bzip2 compression
 ./lrzip -vvbfo lrztest.lrz $infile
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing bzip2 compression
         end
 	exit 1
@@ -195,16 +207,17 @@ fi
 echo testing bzip2 testing
 ./lrzip -vvt lrztest.lrz
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing bzip2 testing
         end
 	exit 1
 fi
 
+rm lrztest.lrz
 echo testing zpaq compression
 ./lrzip -vvzfo lrztest.lrz $infile
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing zpaq compression
         end
 	exit 1
@@ -213,7 +226,7 @@ fi
 echo testing zpaq testing
 ./lrzip -vvt lrztest.lrz
 
-if [ $? -ne 0 ];then
+if [ $? -ne 0 ] || [ ! -f lrztest.lrz ];then
 	echo FAILED testing zpaq testing
         end
 	exit 1