diff --git a/userspace/include/unit/unit.h b/userspace/include/unit/unit.h
index 9438d4d95..2f93bab56 100644
--- a/userspace/include/unit/unit.h
+++ b/userspace/include/unit/unit.h
@@ -67,6 +67,18 @@ struct unit_module {
 	struct unit_module_test		*tests;
 	unsigned long			 nr_tests;
 
+	/*
+	 * Run priority. Currently 3 defined:
+	 *
+	 *   UNIT_PRIO_SELF_TEST
+	 *   UNIT_PRIO_POSIX_TEST
+	 *   UNIT_PRIO_NVGPU_TEST
+	 *
+	 * These let us run environment and POSIX API wrapper tests before the
+	 * rest of the unit tests run.
+	 */
+	unsigned int				 prio;
+
 	/*
 	 * For the core FW to use. Not for modules!!!
 	 */
@@ -74,13 +86,23 @@ struct unit_module {
 	struct unit_fw			*fw;
 };
 
-#define UNIT_MODULE(__name, __tests)					\
+/*
+ * Zero is the higest priority. Increasing the prio value decreases priority to
+ * run.
+ */
+#define UNIT_PRIO_SELF_TEST		0U
+#define UNIT_PRIO_POSIX_TEST		50U
+#define UNIT_PRIO_NVGPU_TEST		100U
+
+#define UNIT_MODULE(__name, __tests, __prio)				\
 	struct unit_module __unit_module__ = {				\
 		.name = #__name,					\
 		.tests = __tests,					\
 		.nr_tests = (sizeof(__tests) /				\
 			     sizeof(struct unit_module_test)),		\
+		.prio = __prio,						\
 		.lib_handle = NULL,					\
+		.fw = NULL,						\
 	}
 
 #define UNIT_TEST(__name, __fn, __args)					\
diff --git a/userspace/src/module.c b/userspace/src/module.c
index c111c6cbb..779c52d3c 100644
--- a/userspace/src/module.c
+++ b/userspace/src/module.c
@@ -99,6 +99,23 @@ static struct unit_module *load_one_module(struct unit_fw *fw,
 	return mod;
 }
 
+static int cmp_module_prio(const void *__mod_a, const void *__mod_b)
+{
+	const struct unit_module *mod_a = __mod_a;
+	const struct unit_module *mod_b = __mod_b;
+
+	return mod_a->prio > mod_b->prio;
+}
+
+/*
+ * Sort the module list according to prio.
+ */
+static void sort_modules_by_prio(struct unit_module **modules, int nr)
+{
+	qsort(modules, (size_t)nr, sizeof(struct unit_module *),
+	      cmp_module_prio);
+}
+
 /*
  * Load all the modules we can from the module load path. Return the list of
  * loaded module as an array of pointers to modules. The returned list of
@@ -159,6 +176,9 @@ struct unit_module **core_load_modules(struct unit_fw *fw)
 	}
 
 	modules[i] = NULL;
+
+	sort_modules_by_prio(modules, i);
+
 	return modules;
 
 err: