diff --git a/tests/gem_linear_blits.c b/tests/gem_linear_blits.c
index fe15f1d1..ec2dc56d 100644
--- a/tests/gem_linear_blits.c
+++ b/tests/gem_linear_blits.c
@@ -189,6 +189,10 @@ int main(int argc, char **argv)
 		count = atoi(argv[1]);
 	if (count == 0)
 		count = 3 * gem_aperture_size(fd) / (1024*1024) / 2;
+	else if (count < 2) {
+		fprintf(stderr, "count must be >= 2\n");
+		return 1;
+	}
 
 	if (count > intel_get_total_ram_mb() * 9 / 10) {
 		count = intel_get_total_ram_mb() * 9 / 10;
diff --git a/tests/gem_render_linear_blits.c b/tests/gem_render_linear_blits.c
index 8ba24a3d..a7e01893 100644
--- a/tests/gem_render_linear_blits.c
+++ b/tests/gem_render_linear_blits.c
@@ -85,6 +85,11 @@ int main(int argc, char **argv)
 		count = atoi(argv[1]);
 	if (count == 0)
 		count = 3 * gem_aperture_size(fd) / SIZE / 2;
+	else if (count < 2) {
+		fprintf(stderr, "count must be >= 2\n");
+		return 1;
+	}
+
 	printf("Using %d 1MiB buffers\n", count);
 
 	bo = malloc(sizeof(*bo)*count);
diff --git a/tests/gem_render_tiled_blits.c b/tests/gem_render_tiled_blits.c
index 31b2ee18..626e652e 100644
--- a/tests/gem_render_tiled_blits.c
+++ b/tests/gem_render_tiled_blits.c
@@ -88,6 +88,11 @@ int main(int argc, char **argv)
 		count = atoi(argv[1]);
 	if (count == 0)
 		count = 3 * gem_aperture_size(fd) / SIZE / 2;
+	else if (count < 2) {
+		fprintf(stderr, "count must be >= 2\n");
+		return 1;
+	}
+
 	printf("Using %d 1MiB buffers\n", count);
 
 	buf = malloc(sizeof(*buf)*count);
diff --git a/tests/gem_tiled_blits.c b/tests/gem_tiled_blits.c
index a6d5555f..bb439760 100644
--- a/tests/gem_tiled_blits.c
+++ b/tests/gem_tiled_blits.c
@@ -132,6 +132,9 @@ int main(int argc, char **argv)
 	if (count == 0) {
 		count = 3 * gem_aperture_size(fd) / (1024*1024) / 2;
 		count += (count & 1) == 0;
+	} else if (count < 2) {
+		fprintf(stderr, "count must be >= 2\n");
+		return 1;
 	}
 
 	if (count > intel_get_total_ram_mb() * 9 / 10) {