diff --git a/cmd/ztest.c b/cmd/ztest.c
index d94451906..dc8ac85b6 100644
--- a/cmd/ztest.c
+++ b/cmd/ztest.c
@@ -8952,6 +8952,12 @@ main(int argc, char **argv)
 
 	libspl_init();
 
+	/*
+	 * Force random_get_bytes() to use /dev/urandom in order to prevent
+	 * ztest from needlessly depleting the system entropy pool.
+	 */
+	random_force_pseudo(B_TRUE);
+
 	if (!fd_data_str) {
 		process_options(argc, argv);
 
diff --git a/lib/libspl/include/sys/random.h b/lib/libspl/include/sys/random.h
index 27f2d4e3a..d11580829 100644
--- a/lib/libspl/include/sys/random.h
+++ b/lib/libspl/include/sys/random.h
@@ -32,6 +32,8 @@
 extern int random_get_bytes(uint8_t *ptr, size_t len);
 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
 
+extern void random_force_pseudo(boolean_t onoff);
+
 static __inline__ uint32_t
 random_in_range(uint32_t range)
 {
diff --git a/lib/libspl/random.c b/lib/libspl/random.c
index 30281504f..c6f0ee7ae 100644
--- a/lib/libspl/random.c
+++ b/lib/libspl/random.c
@@ -37,6 +37,8 @@
 
 static int random_fd = -1, urandom_fd = -1;
 
+static boolean_t force_pseudo = B_FALSE;
+
 void
 random_init(void)
 {
@@ -60,6 +62,12 @@ random_fini(void)
 	urandom_fd = -1;
 }
 
+void
+random_force_pseudo(boolean_t onoff)
+{
+	force_pseudo = onoff;
+}
+
 static int
 random_get_bytes_common(uint8_t *ptr, size_t len, int fd)
 {
@@ -81,6 +89,8 @@ random_get_bytes_common(uint8_t *ptr, size_t len, int fd)
 int
 random_get_bytes(uint8_t *ptr, size_t len)
 {
+	if (force_pseudo)
+		return (random_get_pseudo_bytes(ptr, len));
 	return (random_get_bytes_common(ptr, len, random_fd));
 }