Tests: removed single quotes from system() calls.

Single quotes were used to escape paths with spaces but are neither supported
in the Windows CMD shell, nor sufficient without proper %%TESTDIR%% expansion.
diff --git a/h2_proxy_request_buffering_ssl.t b/h2_proxy_request_buffering_ssl.t
index 427bf75..1af5d77 100644
--- a/h2_proxy_request_buffering_ssl.t
+++ b/h2_proxy_request_buffering_ssl.t
@@ -92,8 +92,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/h2_proxy_ssl.t b/h2_proxy_ssl.t
index ccc311b..f03f0a4 100644
--- a/h2_proxy_ssl.t
+++ b/h2_proxy_ssl.t
@@ -67,8 +67,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/h2_ssl.t b/h2_ssl.t
index 2133f29..fa44582 100644
--- a/h2_ssl.t
+++ b/h2_ssl.t
@@ -66,8 +66,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/h2_ssl_proxy_cache.t b/h2_ssl_proxy_cache.t
index eb40c8f..029040c 100644
--- a/h2_ssl_proxy_cache.t
+++ b/h2_ssl_proxy_cache.t
@@ -80,8 +80,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/h2_ssl_variables.t b/h2_ssl_variables.t
index 1b530a5..4bd14e2 100644
--- a/h2_ssl_variables.t
+++ b/h2_ssl_variables.t
@@ -79,8 +79,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/h2_ssl_verify_client.t b/h2_ssl_verify_client.t
index d505c6d..93d0a41 100644
--- a/h2_ssl_verify_client.t
+++ b/h2_ssl_verify_client.t
@@ -83,8 +83,8 @@
 
 foreach my $name ('localhost', 'client') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/mail_capability.t b/mail_capability.t
index fb9795a..94ad676 100644
--- a/mail_capability.t
+++ b/mail_capability.t
@@ -113,8 +113,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/mail_imap_ssl.t b/mail_imap_ssl.t
index a4b1ff2..c7ebfb5 100644
--- a/mail_imap_ssl.t
+++ b/mail_imap_ssl.t
@@ -129,8 +129,8 @@
 
 foreach my $name ('1.example.com', '2.example.com', '3.example.com') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/mail_ssl.t b/mail_ssl.t
index 03a8add..1b4b031 100644
--- a/mail_ssl.t
+++ b/mail_ssl.t
@@ -148,13 +148,13 @@
 my $d = $t->testdir();
 
 foreach my $name ('localhost', 'inherits') {
-	system("openssl genrsa -out '$d/$name.key' -passout pass:localhost "
+	system("openssl genrsa -out $d/$name.key -passout pass:localhost "
 		. "-aes128 1024 >>$d/openssl.out 2>&1") == 0
 		or die "Can't create private key: $!\n";
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' "
-		. "-key '$d/$name.key' -passin pass:localhost"
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt "
+		. "-key $d/$name.key -passin pass:localhost"
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/proxy_if.t b/proxy_if.t
index 4e6134a..7436321 100644
--- a/proxy_if.t
+++ b/proxy_if.t
@@ -168,8 +168,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/proxy_request_buffering_ssl.t b/proxy_request_buffering_ssl.t
index ed6baa8..36c5963 100644
--- a/proxy_request_buffering_ssl.t
+++ b/proxy_request_buffering_ssl.t
@@ -107,8 +107,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/proxy_ssl.t b/proxy_ssl.t
index 0a57d67..33ef286 100644
--- a/proxy_ssl.t
+++ b/proxy_ssl.t
@@ -91,8 +91,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/proxy_ssl_certificate.t b/proxy_ssl_certificate.t
index 7d59292..85be962 100644
--- a/proxy_ssl_certificate.t
+++ b/proxy_ssl_certificate.t
@@ -110,20 +110,20 @@
 
 foreach my $name ('1.example.com', '2.example.com') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
 
 foreach my $name ('3.example.com') {
-	system("openssl genrsa -out '$d/$name.key' -passout pass:$name "
+	system("openssl genrsa -out $d/$name.key -passout pass:$name "
 		. "-aes128 1024 >>$d/openssl.out 2>&1") == 0
 		or die "Can't create private key: $!\n";
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' "
-		. "-key '$d/$name.key' -passin pass:$name"
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt "
+		. "-key $d/$name.key -passin pass:$name"
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/proxy_ssl_keepalive.t b/proxy_ssl_keepalive.t
index 29ebae8..aefdcca 100644
--- a/proxy_ssl_keepalive.t
+++ b/proxy_ssl_keepalive.t
@@ -83,8 +83,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/proxy_ssl_name.t b/proxy_ssl_name.t
index 21b46a9..5557a36 100644
--- a/proxy_ssl_name.t
+++ b/proxy_ssl_name.t
@@ -126,8 +126,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/commonName=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /commonName=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/proxy_ssl_verify.t b/proxy_ssl_verify.t
index c1d07a5..efb2151 100644
--- a/proxy_ssl_verify.t
+++ b/proxy_ssl_verify.t
@@ -136,8 +136,8 @@
 
 foreach my $name ('1.example.com', '2.example.com') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.$name.conf' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.$name.conf "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/ssl.t b/ssl.t
index 45bd6b0..3c4512e 100644
--- a/ssl.t
+++ b/ssl.t
@@ -161,27 +161,27 @@
 $t->write_file('certindex', '');
 
 system('openssl req -x509 -new '
-	. "-config '$d/openssl.conf' -subj '/CN=issuer/' "
-	. "-out '$d/issuer.crt' -keyout '$d/issuer.key' "
+	. "-config $d/openssl.conf -subj /CN=issuer/ "
+	. "-out $d/issuer.crt -keyout $d/issuer.key "
 	. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't create certificate for issuer: $!\n";
 
 system("openssl req -new "
-	. "-config '$d/openssl.conf' -subj '/CN=subject/' "
-	. "-out '$d/subject.csr' -keyout '$d/subject.key' "
+	. "-config $d/openssl.conf -subj /CN=subject/ "
+	. "-out $d/subject.csr -keyout $d/subject.key "
 	. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't create certificate for subject: $!\n";
 
-system("openssl ca -batch -config '$d/ca.conf' "
-	. "-keyfile '$d/issuer.key' -cert '$d/issuer.crt' "
-	. "-subj '/CN=subject/' -in '$d/subject.csr' -out '$d/subject.crt' "
+system("openssl ca -batch -config $d/ca.conf "
+	. "-keyfile $d/issuer.key -cert $d/issuer.crt "
+	. "-subj /CN=subject/ -in $d/subject.csr -out $d/subject.crt "
 	. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't sign certificate for subject: $!\n";
 
 foreach my $name ('localhost', 'inner') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/ssl2.t b/ssl2.t
index 7b0f0ba..a1b7932 100644
--- a/ssl2.t
+++ b/ssl2.t
@@ -98,27 +98,27 @@
 $t->write_file('certindex', '');
 
 system('openssl req -x509 -new '
-	. "-config '$d/openssl.conf' -subj '/CN=issuer/' "
-	. "-out '$d/issuer.crt' -keyout '$d/issuer.key' "
+	. "-config $d/openssl.conf -subj /CN=issuer/ "
+	. "-out $d/issuer.crt -keyout $d/issuer.key "
 	. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't create certificate for issuer: $!\n";
 
 system("openssl req -new "
-	. "-config '$d/openssl.conf' -subj '/CN=subject/' "
-	. "-out '$d/subject.csr' -keyout '$d/subject.key' "
+	. "-config $d/openssl.conf -subj /CN=subject/ "
+	. "-out $d/subject.csr -keyout $d/subject.key "
 	. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't create certificate for subject: $!\n";
 
-system("openssl ca -batch -config '$d/ca.conf' "
-	. "-keyfile '$d/issuer.key' -cert '$d/issuer.crt' "
-	. "-subj '/CN=subject/' -in '$d/subject.csr' -out '$d/subject.crt' "
+system("openssl ca -batch -config $d/ca.conf "
+	. "-keyfile $d/issuer.key -cert $d/issuer.crt "
+	. "-subj /CN=subject/ -in $d/subject.csr -out $d/subject.crt "
 	. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't sign certificate for subject: $!\n";
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/ssl_certificate_chain.t b/ssl_certificate_chain.t
index f18df6c..afb056b 100644
--- a/ssl_certificate_chain.t
+++ b/ssl_certificate_chain.t
@@ -101,16 +101,16 @@
 
 foreach my $name ('root') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
 
 foreach my $name ('int', 'end') {
 	system("openssl req -new "
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.csr' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.csr -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
@@ -118,15 +118,15 @@
 $t->write_file('certserial', '1000');
 $t->write_file('certindex', '');
 
-system("openssl ca -batch -config '$d/ca.conf' "
-	. "-keyfile '$d/root.key' -cert '$d/root.crt' "
-	. "-subj '/CN=int/' -in '$d/int.csr' -out '$d/int.crt' "
+system("openssl ca -batch -config $d/ca.conf "
+	. "-keyfile $d/root.key -cert $d/root.crt "
+	. "-subj /CN=int/ -in $d/int.csr -out $d/int.crt "
 	. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't sign certificate for int: $!\n";
 
-system("openssl ca -batch -config '$d/ca.conf' "
-	. "-keyfile '$d/int.key' -cert '$d/int.crt' "
-	. "-subj '/CN=end/' -in '$d/end.csr' -out '$d/end.crt' "
+system("openssl ca -batch -config $d/ca.conf "
+	. "-keyfile $d/int.key -cert $d/int.crt "
+	. "-subj /CN=end/ -in $d/end.csr -out $d/end.crt "
 	. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't sign certificate for end: $!\n";
 
diff --git a/ssl_certificates.t b/ssl_certificates.t
index 8188d36..96ee71c 100644
--- a/ssl_certificates.t
+++ b/ssl_certificates.t
@@ -71,15 +71,15 @@
 
 my $d = $t->testdir();
 
-system("openssl ecparam -genkey -out '$d/ec.key' -name prime256v1 "
+system("openssl ecparam -genkey -out $d/ec.key -name prime256v1 "
 	. ">>$d/openssl.out 2>&1") == 0 or die "Can't create EC pem: $!\n";
-system("openssl genrsa -out '$d/rsa.key' 1024 >>$d/openssl.out 2>&1") == 0
+system("openssl genrsa -out $d/rsa.key 1024 >>$d/openssl.out 2>&1") == 0
         or die "Can't create RSA pem: $!\n";
 
 foreach my $name ('ec', 'rsa') {
-	system("openssl req -x509 -new -key '$d/$name.key' "
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+	system("openssl req -x509 -new -key $d/$name.key "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/ssl_crl.t b/ssl_crl.t
index 9a157b4..5e82944 100644
--- a/ssl_crl.t
+++ b/ssl_crl.t
@@ -105,16 +105,16 @@
 
 foreach my $name ('root', 'localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
 
 foreach my $name ('int', 'end') {
 	system("openssl req -new "
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.csr' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.csr -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
@@ -122,32 +122,32 @@
 $t->write_file('certserial', '1000');
 $t->write_file('certindex', '');
 
-system("openssl ca -batch -config '$d/ca.conf' "
-	. "-keyfile '$d/root.key' -cert '$d/root.crt' "
-	. "-subj '/CN=int/' -in '$d/int.csr' -out '$d/int.crt' "
+system("openssl ca -batch -config $d/ca.conf "
+	. "-keyfile $d/root.key -cert $d/root.crt "
+	. "-subj /CN=int/ -in $d/int.csr -out $d/int.crt "
 	. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't sign certificate for int: $!\n";
 
-system("openssl ca -batch -config '$d/ca.conf' "
-	. "-keyfile '$d/int.key' -cert '$d/int.crt' "
-	. "-subj '/CN=end/' -in '$d/end.csr' -out '$d/end.crt' "
+system("openssl ca -batch -config $d/ca.conf "
+	. "-keyfile $d/int.key -cert $d/int.crt "
+	. "-subj /CN=end/ -in $d/end.csr -out $d/end.crt "
 	. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't sign certificate for end: $!\n";
 
-system("openssl ca -gencrl -config '$d/ca.conf' "
-	. "-keyfile '$d/root.key' -cert '$d/root.crt' "
-	. "-out '$d/empty.crl' -crldays 1 "
+system("openssl ca -gencrl -config $d/ca.conf "
+	. "-keyfile $d/root.key -cert $d/root.crt "
+	. "-out $d/empty.crl -crldays 1 "
 	. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't create empty crl: $!\n";
 
-system("openssl ca -config '$d/ca.conf' -revoke '$d/int.crt' "
-	. "-keyfile '$d/root.key' -cert '$d/root.crt' "
+system("openssl ca -config $d/ca.conf -revoke $d/int.crt "
+	. "-keyfile $d/root.key -cert $d/root.crt "
 	. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't revoke int.crt: $!\n";
 
-system("openssl ca -gencrl -config '$d/ca.conf' "
-	. "-keyfile '$d/root.key' -cert '$d/root.crt' "
-	. "-out '$d/root.crl' -crldays 1 "
+system("openssl ca -gencrl -config $d/ca.conf "
+	. "-keyfile $d/root.key -cert $d/root.crt "
+	. "-out $d/root.crl -crldays 1 "
 	. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't update crl: $!\n";
 
diff --git a/ssl_engine_keys.t b/ssl_engine_keys.t
index 9c530ad..32b58cb 100644
--- a/ssl_engine_keys.t
+++ b/ssl_engine_keys.t
@@ -112,8 +112,8 @@
 		. ">>$d/openssl.out 2>&1");
 
 	system('openssl req -x509 -new -engine pkcs11 '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyform engine -text -key id_00 "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyform engine -text -key id_00 "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/ssl_password_file.t b/ssl_password_file.t
index bc82494..60aacc3 100644
--- a/ssl_password_file.t
+++ b/ssl_password_file.t
@@ -102,13 +102,13 @@
 mkfifo("$d/password_fifo", 0700);
 
 foreach my $name ('localhost', 'inherits') {
-	system("openssl genrsa -out '$d/$name.key' -passout pass:$name "
+	system("openssl genrsa -out $d/$name.key -passout pass:$name "
 		. "-aes128 1024 >>$d/openssl.out 2>&1") == 0
 		or die "Can't create private key: $!\n";
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' "
-		. "-key '$d/$name.key' -passin pass:$name"
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt "
+		. "-key $d/$name.key -passin pass:$name"
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/ssl_proxy_protocol.t b/ssl_proxy_protocol.t
index 7240bd3..896e2fe 100644
--- a/ssl_proxy_protocol.t
+++ b/ssl_proxy_protocol.t
@@ -86,8 +86,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't create certificate for $name: $!\n";
 }
diff --git a/ssl_proxy_upgrade.t b/ssl_proxy_upgrade.t
index 0940d97..c278875 100644
--- a/ssl_proxy_upgrade.t
+++ b/ssl_proxy_upgrade.t
@@ -82,8 +82,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/ssl_sni.t b/ssl_sni.t
index d9de902..3f8061c 100644
--- a/ssl_sni.t
+++ b/ssl_sni.t
@@ -94,8 +94,8 @@
 
 foreach my $name ('localhost', 'example.com') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/ssl_sni_reneg.t b/ssl_sni_reneg.t
index 8fd7f88..28f1641 100644
--- a/ssl_sni_reneg.t
+++ b/ssl_sni_reneg.t
@@ -79,8 +79,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/ssl_sni_sessions.t b/ssl_sni_sessions.t
index b2f33c6..903db5a 100644
--- a/ssl_sni_sessions.t
+++ b/ssl_sni_sessions.t
@@ -118,8 +118,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/ssl_verify_client.t b/ssl_verify_client.t
index 1f0bfdc..d2c8618 100644
--- a/ssl_verify_client.t
+++ b/ssl_verify_client.t
@@ -107,8 +107,8 @@
 
 foreach my $name ('1.example.com', '2.example.com', '3.example.com') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/ssl_verify_depth.t b/ssl_verify_depth.t
index 3be378e..1e438d1 100644
--- a/ssl_verify_depth.t
+++ b/ssl_verify_depth.t
@@ -87,16 +87,16 @@
 
 foreach my $name ('root', 'localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
 
 foreach my $name ('int', 'end') {
 	system("openssl req -new "
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.csr' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.csr -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
@@ -104,15 +104,15 @@
 $t->write_file('certserial', '1000');
 $t->write_file('certindex', '');
 
-system("openssl ca -batch -config '$d/ca.conf' "
-	. "-keyfile '$d/root.key' -cert '$d/root.crt' "
-	. "-subj '/CN=int/' -in '$d/int.csr' -out '$d/int.crt' "
+system("openssl ca -batch -config $d/ca.conf "
+	. "-keyfile $d/root.key -cert $d/root.crt "
+	. "-subj /CN=int/ -in $d/int.csr -out $d/int.crt "
 	. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't sign certificate for int: $!\n";
 
-system("openssl ca -batch -config '$d/ca.conf' "
-	. "-keyfile '$d/int.key' -cert '$d/int.crt' "
-	. "-subj '/CN=end/' -in '$d/end.csr' -out '$d/end.crt' "
+system("openssl ca -batch -config $d/ca.conf "
+	. "-keyfile $d/int.key -cert $d/int.crt "
+	. "-subj /CN=end/ -in $d/end.csr -out $d/end.crt "
 	. ">>$d/openssl.out 2>&1") == 0
 	or die "Can't sign certificate for end: $!\n";
 
diff --git a/stream_proxy_protocol_ssl.t b/stream_proxy_protocol_ssl.t
index b235191..d64e6c3 100644
--- a/stream_proxy_protocol_ssl.t
+++ b/stream_proxy_protocol_ssl.t
@@ -69,8 +69,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/stream_proxy_ssl.t b/stream_proxy_ssl.t
index 459c242..15371f8 100644
--- a/stream_proxy_ssl.t
+++ b/stream_proxy_ssl.t
@@ -95,8 +95,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/stream_proxy_ssl_certificate.t b/stream_proxy_ssl_certificate.t
index 21b5e78..1c56d05 100644
--- a/stream_proxy_ssl_certificate.t
+++ b/stream_proxy_ssl_certificate.t
@@ -114,20 +114,20 @@
 
 foreach my $name ('1.example.com', '2.example.com') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
 
 foreach my $name ('3.example.com') {
-	system("openssl genrsa -out '$d/$name.key' -passout pass:$name "
+	system("openssl genrsa -out $d/$name.key -passout pass:$name "
 		. "-aes128 1024 >>$d/openssl.out 2>&1") == 0
 		or die "Can't create private key: $!\n";
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' "
-		. "-key '$d/$name.key' -passin pass:$name"
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt "
+		. "-key $d/$name.key -passin pass:$name"
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/stream_proxy_ssl_name.t b/stream_proxy_ssl_name.t
index a17deaa..c3064c3 100644
--- a/stream_proxy_ssl_name.t
+++ b/stream_proxy_ssl_name.t
@@ -111,8 +111,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/stream_proxy_ssl_name_complex.t b/stream_proxy_ssl_name_complex.t
index 0257c08..acfb56a 100644
--- a/stream_proxy_ssl_name_complex.t
+++ b/stream_proxy_ssl_name_complex.t
@@ -72,8 +72,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/stream_proxy_ssl_verify.t b/stream_proxy_ssl_verify.t
index b9a0178..5cd827c 100644
--- a/stream_proxy_ssl_verify.t
+++ b/stream_proxy_ssl_verify.t
@@ -136,8 +136,8 @@
 
 foreach my $name ('1.example.com', '2.example.com') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.$name.conf' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.$name.conf "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/stream_ssl.t b/stream_ssl.t
index 57b7e9d..78490e2 100644
--- a/stream_ssl.t
+++ b/stream_ssl.t
@@ -102,13 +102,13 @@
 mkfifo("$d/password_fifo", 0700);
 
 foreach my $name ('localhost', 'inherits') {
-	system("openssl genrsa -out '$d/$name.key' -passout pass:$name "
+	system("openssl genrsa -out $d/$name.key -passout pass:$name "
 		. "-aes128 1024 >>$d/openssl.out 2>&1") == 0
 		or die "Can't create private key: $!\n";
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' "
-		. "-key '$d/$name.key' -passin pass:$name"
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt "
+		. "-key $d/$name.key -passin pass:$name"
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/stream_ssl_preread.t b/stream_ssl_preread.t
index 11465c3..d2a56c5 100644
--- a/stream_ssl_preread.t
+++ b/stream_ssl_preread.t
@@ -136,8 +136,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/stream_ssl_realip.t b/stream_ssl_realip.t
index acbdd22..954850b 100644
--- a/stream_ssl_realip.t
+++ b/stream_ssl_realip.t
@@ -95,8 +95,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/stream_ssl_variables.t b/stream_ssl_variables.t
index 51cab68..88b0731 100644
--- a/stream_ssl_variables.t
+++ b/stream_ssl_variables.t
@@ -84,8 +84,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/stream_ssl_verify_client.t b/stream_ssl_verify_client.t
index ccf8022..e129417 100644
--- a/stream_ssl_verify_client.t
+++ b/stream_ssl_verify_client.t
@@ -102,8 +102,8 @@
 
 foreach my $name ('1.example.com', '2.example.com', '3.example.com') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/stream_upstream_zone_ssl.t b/stream_upstream_zone_ssl.t
index 949b9c1..12b37d5 100644
--- a/stream_upstream_zone_ssl.t
+++ b/stream_upstream_zone_ssl.t
@@ -96,8 +96,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }
diff --git a/upstream_zone_ssl.t b/upstream_zone_ssl.t
index f4c7242..32732f4 100644
--- a/upstream_zone_ssl.t
+++ b/upstream_zone_ssl.t
@@ -101,8 +101,8 @@
 
 foreach my $name ('localhost') {
 	system('openssl req -x509 -new '
-		. "-config '$d/openssl.conf' -subj '/CN=$name/' "
-		. "-out '$d/$name.crt' -keyout '$d/$name.key' "
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
 		. ">>$d/openssl.out 2>&1") == 0
 		or die "Can't create certificate for $name: $!\n";
 }