diff --git a/test/tap/tests/mysql-fast_forward-t.cpp b/test/tap/tests/mysql-fast_forward-t.cpp
index 7cf1b230a0..dcf89ca6a9 100644
--- a/test/tap/tests/mysql-fast_forward-t.cpp
+++ b/test/tap/tests/mysql-fast_forward-t.cpp
@@ -32,7 +32,7 @@ int create_connections() {
 	for (int i = 0; i < NUM_CONNS ; i++) {
 
 		MYSQL * mysql = mysql_init(NULL);
-		diag("Connecting: cl.username='%s' cl.use_ssl=%d cl.compression", cl.admin_username, cl.use_ssl, cl.compression);
+		diag("Connecting: cl.username='%s' cl.use_ssl=%d cl.compression=%d", cl.admin_username, cl.use_ssl, cl.compression);
 		if (cl.use_ssl)
 			mysql_ssl_set(mysql, NULL, NULL, NULL, NULL, NULL);
 		if (cl.compression)
diff --git a/test/tap/tests/test_prometheus_metrics-t.cpp b/test/tap/tests/test_prometheus_metrics-t.cpp
index 0239f3999e..25dd082bfb 100644
--- a/test/tap/tests/test_prometheus_metrics-t.cpp
+++ b/test/tap/tests/test_prometheus_metrics-t.cpp
@@ -148,7 +148,7 @@ bool trigger_access_denied_wrong_password_total(MYSQL*, MYSQL*) {
 	bool access_denied_error = false;
 	// Connect to ProxySQL
 	MYSQL* proxysql = mysql_init(NULL);
-	diag("Connecting: username='%s' cl.use_ssl=%d cl.compression", "invalid_username", cl.use_ssl, cl.compression);
+	diag("Connecting: username='%s' cl.use_ssl=%d cl.compression=%d", "invalid_username", cl.use_ssl, cl.compression);
 	if (cl.use_ssl)
 		mysql_ssl_set(proxysql, NULL, NULL, NULL, NULL, NULL);
 	if (cl.compression)
diff --git a/test/tap/tests/test_sqlite3_server-t.cpp b/test/tap/tests/test_sqlite3_server-t.cpp
index 9c2a618955..9de918b88f 100644
--- a/test/tap/tests/test_sqlite3_server-t.cpp
+++ b/test/tap/tests/test_sqlite3_server-t.cpp
@@ -379,7 +379,7 @@ int main(int argc, char** argv) {
 		std::string inv_user_err {};
 		bool failed_to_connect = false;
 		MYSQL* proxysql_sqlite3 = mysql_init(NULL);
-		diag("Connecting: username='%s' cl.use_ssl=%d cl.compression", "foobar_user", cl.use_ssl, cl.compression);
+		diag("Connecting: username='%s' cl.use_ssl=%d cl.compression=%d", "foobar_user", cl.use_ssl, cl.compression);
 		if (cl.use_ssl)
 			mysql_ssl_set(proxysql_sqlite3, NULL, NULL, NULL, NULL, NULL);
 		if (cl.compression)