Index: uspace/srv/sysman/test/job_closure.c
===================================================================
--- uspace/srv/sysman/test/job_closure.c	(revision 25a9fecf7b303cf4575120fe19a448e7446dc717)
+++ uspace/srv/sysman/test/job_closure.c	(revision be07995661547b856a461a29a94ec0fbbb5a8fb0)
@@ -32,4 +32,5 @@
 
 #include "../job_closure.h"
+#include "../repo.h"
 
 #include "mock_unit.h"
@@ -50,6 +51,6 @@
 {
 	if (expected->size != actual->size) {
-		printf("%s: |expected| - |actual| = %u\n",
-		    __func__, expected->size - actual->size);
+		printf("%s: |expected|, |actual| = %u, %u\n",
+		    __func__, expected->size, actual->size);
 		return false;
 	}
@@ -119,4 +120,6 @@
 	rc = dyn_array_reserve(&act_closure, MAX_TYPES * MAX_UNITS);
 	assert(rc == EOK);
+
+	repo_init();
 }
 
@@ -148,5 +151,5 @@
 	assert(main_job);
 
-	int rc = job_create_closure(main_job, &act_closure);
+	int rc = job_create_closure(main_job, &act_closure, 0);
 	PCUT_ASSERT_INT_EQUALS(EOK, rc);
 
@@ -179,5 +182,5 @@
 	assert(main_job);
 
-	int rc = job_create_closure(main_job, &act_closure);
+	int rc = job_create_closure(main_job, &act_closure, 0);
 	PCUT_ASSERT_INT_EQUALS(EOK, rc);
 
@@ -212,5 +215,5 @@
 	assert(main_job);
 
-	int rc = job_create_closure(main_job, &act_closure);
+	int rc = job_create_closure(main_job, &act_closure, 0);
 	PCUT_ASSERT_INT_EQUALS(EOK, rc);
 
@@ -227,4 +230,57 @@
 }
 
+PCUT_TEST(job_closure_isolate_linears) {
+	unit_t *u0 = mock_units[UNIT_SERVICE][0];
+	unit_t *u1 = mock_units[UNIT_SERVICE][1];
+	unit_t *u2 = mock_units[UNIT_SERVICE][2];
+	unit_t *u3 = mock_units[UNIT_SERVICE][3];
+	unit_t *u4 = mock_units[UNIT_SERVICE][4];
+	unit_t *u5 = mock_units[UNIT_SERVICE][5];
+	unit_t *u6 = mock_units[UNIT_SERVICE][6];
+	repo_begin_update();
+	for (int i = 0; i < 7; ++i) {
+		repo_add_unit(mock_units[UNIT_SERVICE][i]);
+	}
+	repo_commit();
+
+	/*
+	 *
+	 * u0 -> u1 -> u2
+	 *
+	 * u3 -> u4 -> u5
+	 *
+	 * u6
+	 */
+	mock_add_edge(u0, u1);
+	mock_add_edge(u1, u2);
+
+	mock_add_edge(u3, u4);
+	mock_add_edge(u4, u5);
+
+	job_t *main_job = job_create(u1, STATE_STARTED);
+	assert(main_job);
+
+	int rc = job_create_closure(main_job, &act_closure, CLOSURE_ISOLATE);
+	PCUT_ASSERT_INT_EQUALS(EOK, rc);
+
+	dyn_array_append(&exp_closure, job_t *, dummy_job(u0, STATE_STOPPED));
+	dyn_array_append(&exp_closure, job_t *, dummy_job(u1, STATE_STARTED));
+	dyn_array_append(&exp_closure, job_t *, dummy_job(u2, STATE_STARTED));
+	dyn_array_append(&exp_closure, job_t *, dummy_job(u3, STATE_STOPPED));
+	dyn_array_append(&exp_closure, job_t *, dummy_job(u4, STATE_STOPPED));
+	dyn_array_append(&exp_closure, job_t *, dummy_job(u5, STATE_STOPPED));
+	dyn_array_append(&exp_closure, job_t *, dummy_job(u6, STATE_STOPPED));
+
+	dummy_add_closure(&act_closure);
+
+	PCUT_ASSERT_TRUE(same_jobs(&exp_closure, &act_closure));
+	PCUT_ASSERT_TRUE(job_blocked(u1->job, u2->job));
+
+	PCUT_ASSERT_TRUE(job_blocked(u5->job, u4->job));
+	PCUT_ASSERT_TRUE(job_blocked(u4->job, u3->job));
+
+	PCUT_ASSERT_INT_EQUALS(0, u6->job->blocking_jobs);
+	PCUT_ASSERT_INT_EQUALS(0, u0->job->blocking_jobs);
+}
 
 PCUT_EXPORT(job_closure);
Index: uspace/srv/sysman/test/mock_unit.h
===================================================================
--- uspace/srv/sysman/test/mock_unit.h	(revision 25a9fecf7b303cf4575120fe19a448e7446dc717)
+++ uspace/srv/sysman/test/mock_unit.h	(revision be07995661547b856a461a29a94ec0fbbb5a8fb0)
@@ -36,5 +36,5 @@
 #include "../unit.h"
 
-#define MAX_UNITS 5
+#define MAX_UNITS 7
 #define MAX_TYPES 4