diff --git a/Makefile b/Makefile
index ab0ea242e8915b5e92c7749ec76f5d9a0a699305..571ada8ce7fb0af61ee156e3624b8b7439ecc2a5 100644
--- a/Makefile
+++ b/Makefile
@@ -9,22 +9,22 @@ clean:
 
 test: clean
 	./ssl-ca init
-	test "$$(openssl rsa -noout -check -in CA.key)" == "RSA key ok"
-	test "$$(openssl verify -CAfile CA.crt CA.crt)" == "CA.crt: OK"
+	test "$$(openssl rsa -noout -check -in CA.key)" = "RSA key ok"
+	test "$$(openssl verify -CAfile CA.crt CA.crt)" = "CA.crt: OK"
 	./ssl-ca gen www
-	test "$$(openssl rsa -noout -check -in keys/www)" == "RSA key ok"
+	test "$$(openssl rsa -noout -check -in keys/www)" = "RSA key ok"
 	openssl verify -CAfile CA.crt certs/www
-	test "$$(openssl x509 -in certs/www -issuer -noout)" == "issuer= /CN=*.*.ssl-ca"
-	test "$$(openssl x509 -in certs/www -subject -noout)" == "subject= /CN=*.*.www.ssl-ca"
+	test "$$(openssl x509 -in certs/www -issuer -noout)" = "issuer= /CN=*.*.ssl-ca"
+	test "$$(openssl x509 -in certs/www -subject -noout)" = "subject= /CN=*.*.www.ssl-ca"
 	openssl genrsa -out keys/smtp
 	./ssl-ca sign
 	openssl verify -CAfile CA.crt certs/smtp
-	test "$$(openssl x509 -in certs/smtp -issuer -noout)" == "issuer= /CN=*.*.ssl-ca"
-	test "$$(openssl x509 -in certs/smtp -subject -noout)" == "subject= /CN=*.*.smtp.ssl-ca"
+	test "$$(openssl x509 -in certs/smtp -issuer -noout)" = "issuer= /CN=*.*.ssl-ca"
+	test "$$(openssl x509 -in certs/smtp -subject -noout)" = "subject= /CN=*.*.smtp.ssl-ca"
 	./ssl-ca resign
 	openssl verify -CAfile CA.crt certs/www
 	openssl verify -CAfile CA.crt certs/smtp
-	test "$$(openssl x509 -in certs/www -issuer -noout)" == "issuer= /CN=*.*.ssl-ca"
-	test "$$(openssl x509 -in certs/www -subject -noout)" == "subject= /CN=*.*.www.ssl-ca"
-	test "$$(openssl x509 -in certs/smtp -issuer -noout)" == "issuer= /CN=*.*.ssl-ca"
-	test "$$(openssl x509 -in certs/smtp -subject -noout)" == "subject= /CN=*.*.smtp.ssl-ca"
+	test "$$(openssl x509 -in certs/www -issuer -noout)" = "issuer= /CN=*.*.ssl-ca"
+	test "$$(openssl x509 -in certs/www -subject -noout)" = "subject= /CN=*.*.www.ssl-ca"
+	test "$$(openssl x509 -in certs/smtp -issuer -noout)" = "issuer= /CN=*.*.ssl-ca"
+	test "$$(openssl x509 -in certs/smtp -subject -noout)" = "subject= /CN=*.*.smtp.ssl-ca"