diff --git a/sway/commands.c b/sway/commands.c
index b09a04c71..985c4577e 100644
--- a/sway/commands.c
+++ b/sway/commands.c
@@ -180,7 +180,7 @@ static void set_config_node(struct sway_node *node, bool node_overridden) {
 	config->handler_context.workspace = NULL;
 	config->handler_context.node_overridden = node_overridden;
 
-	if (node == NULL) {
+	if (!node) {
 		return;
 	}
 
@@ -205,7 +205,7 @@ list_t *execute_command(char *_exec, struct sway_seat *seat,
 	list_t *containers = NULL;
 	bool using_criteria = false;
 
-	if (seat == NULL) {
+	if (!seat) {
 		// passing a NULL seat means we just pick the default seat
 		seat = input_manager_get_default_seat();
 		if (!sway_assert(seat, "could not find a seat to run the command on")) {
diff --git a/sway/commands/move.c b/sway/commands/move.c
index f2702fa17..736fd6a20 100644
--- a/sway/commands/move.c
+++ b/sway/commands/move.c
@@ -516,7 +516,7 @@ static struct cmd_results *cmd_move_container(bool no_auto_back_and_forth,
 		destination = seat_get_focus_inactive(seat, &new_output->node);
 	} else if (strcasecmp(argv[0], "mark") == 0) {
 		struct sway_container *dest_con = container_find_mark(argv[1]);
-		if (dest_con == NULL) {
+		if (!dest_con) {
 			return cmd_results_new(CMD_FAILURE,
 					"Mark '%s' not found", argv[1]);
 		}
diff --git a/sway/commands/opacity.c b/sway/commands/opacity.c
index 96e6228ed..b560e7e0b 100644
--- a/sway/commands/opacity.c
+++ b/sway/commands/opacity.c
@@ -13,7 +13,7 @@ struct cmd_results *cmd_opacity(int argc, char **argv) {
 
 	struct sway_container *con = config->handler_context.container;
 
-	if (con == NULL) {
+	if (!con) {
 		return cmd_results_new(CMD_FAILURE, "No current container");
 	}
 
diff --git a/sway/commands/output/transform.c b/sway/commands/output/transform.c
index f4fcc8c99..1fc311f91 100644
--- a/sway/commands/output/transform.c
+++ b/sway/commands/output/transform.c
@@ -71,7 +71,7 @@ struct cmd_results *output_cmd_transform(int argc, char **argv) {
 				"Cannot apply relative transform to all outputs.");
 		}
 		struct sway_output *s_output = output_by_name_or_id(output->name);
-		if (s_output == NULL) {
+		if (!s_output) {
 			return cmd_results_new(CMD_INVALID,
 				"Cannot apply relative transform to unknown output %s", output->name);
 		}