diff --git a/userspace/units/gr/init/nvgpu-gr-init-hal-gv11b.c b/userspace/units/gr/init/nvgpu-gr-init-hal-gv11b.c
index d06db78a6..9ba44a13e 100644
--- a/userspace/units/gr/init/nvgpu-gr-init-hal-gv11b.c
+++ b/userspace/units/gr/init/nvgpu-gr-init-hal-gv11b.c
@@ -828,6 +828,14 @@ int test_gr_init_hal_error_injection(struct unit_module *m,
 		unit_return_fail(m, "expected size not set");
 	}
 
+	/*
+	 * Trigger these HALs with tpc_count = 0, only for code coverage.
+	 * We are not interested in return values since tpc_count cannot be
+	 * 0 in any practical case.
+	 */
+	EXPECT_BUG(g->ops.gr.init.get_attrib_cb_size(g, 0));
+	EXPECT_BUG(g->ops.gr.init.get_alpha_cb_size(g, 0));
+
 	/* cleanup */
 	nvgpu_gr_ctx_free_patch_ctx(g, vm, gr_ctx);
 	nvgpu_free_gr_ctx_struct(g, gr_ctx);
diff --git a/userspace/units/gr/init/nvgpu-gr-init-hal-gv11b.h b/userspace/units/gr/init/nvgpu-gr-init-hal-gv11b.h
index ad882e712..99f440d0f 100644
--- a/userspace/units/gr/init/nvgpu-gr-init-hal-gv11b.h
+++ b/userspace/units/gr/init/nvgpu-gr-init-hal-gv11b.h
@@ -258,6 +258,10 @@ int test_gr_init_hal_config_error_injection(struct unit_module *m,
  *
  * Targets: gops_gr_init.commit_global_pagepool,
  *          gp10b_gr_init_commit_global_pagepool
+ *          gops_gr_init.get_attrib_cb_size,
+ *          gv11b_gr_init_get_attrib_cb_size,
+ *          gops_gr_init.get_alpha_cb_size,
+ *          gv11b_gr_init_get_alpha_cb_size
  *
  * Input: gr_init_setup, gr_init_prepare, gr_init_support must have
  *        been executed successfully.
@@ -268,6 +272,9 @@ int test_gr_init_hal_config_error_injection(struct unit_module *m,
  * - Call g->ops.gr.init.commit_global_pagepool with global_ctx flag set
  *   to false and with arbitrary size.
  * - Read back size from register and ensure correct size is set.
+ * - Call g->ops.gr.init.get_attrib_cb_size and g->ops.gr.init.get_alpha_cb_size
+ *   with tpc_count = 0 for code coverage. Ensure that a BUG() is triggered.
+ *   We are not interested in return value since tpc_count can never be 0.
  * - Cleanup temporary resources.
  *
  * Output: Returns PASS if the steps above were executed successfully. FAIL