diff --git a/drivers/timer/Kconfig.nrf_grtc b/drivers/timer/Kconfig.nrf_grtc
index cda39ae8b1c..b136f654252 100644
--- a/drivers/timer/Kconfig.nrf_grtc
+++ b/drivers/timer/Kconfig.nrf_grtc
@@ -54,7 +54,7 @@ config NRF_GRTC_TIMER_AUTO_KEEP_ALIVE
 	bool
 	default y if NRF_GRTC_START_SYSCOUNTER
 	help
-	  This feature prevents the SYSCOUNTER to sleep when any core is in
+	  This feature prevents the SYSCOUNTER from sleeping when any core is in
 	  active state.
 
 endif # NRF_GRTC_TIMER
diff --git a/tests/drivers/timer/nrf_grtc_timer/src/main.c b/tests/drivers/timer/nrf_grtc_timer/src/main.c
index 197270cc6a4..f8d33d8c53a 100644
--- a/tests/drivers/timer/nrf_grtc_timer/src/main.c
+++ b/tests/drivers/timer/nrf_grtc_timer/src/main.c
@@ -8,12 +8,15 @@
 #include <hal/nrf_grtc.h>
 
 #define GRTC_SLEW_TICKS 10
+#define NUMBER_OF_TRIES 2000
+#define CYC_PER_TICK                                                                               \
+	((uint64_t)sys_clock_hw_cycles_per_sec() / (uint64_t)CONFIG_SYS_CLOCK_TICKS_PER_SEC)
 
 ZTEST(nrf_grtc_timer, test_get_ticks)
 {
 	k_timeout_t t = K_MSEC(1);
 
-	uint64_t exp_ticks = z_nrf_grtc_timer_read() + t.ticks;
+	uint64_t exp_ticks = z_nrf_grtc_timer_read() + t.ticks * CYC_PER_TICK;
 	int64_t ticks;
 
 	/* Relative 1ms from now timeout converted to GRTC */
@@ -21,20 +24,28 @@ ZTEST(nrf_grtc_timer, test_get_ticks)
 	zassert_true((ticks >= exp_ticks) && (ticks <= (exp_ticks + GRTC_SLEW_TICKS)),
 		     "Unexpected result %" PRId64 " (expected: %" PRId64 ")", ticks, exp_ticks);
 
-	/* Absolute timeout 1ms in the past */
-	t = Z_TIMEOUT_TICKS(Z_TICK_ABS(sys_clock_tick_get() - K_MSEC(1).ticks));
+	k_msleep(1);
 
-	exp_ticks = z_nrf_grtc_timer_read() - K_MSEC(1).ticks;
-	ticks = z_nrf_grtc_timer_get_ticks(t);
-	zassert_true((ticks >= exp_ticks) && (ticks <= (exp_ticks + GRTC_SLEW_TICKS)),
-		     "Unexpected result %" PRId64 " (expected: %" PRId64 ")", ticks, exp_ticks);
+	for (uint32_t i = 0; i < NUMBER_OF_TRIES; i++) {
+		/* Absolute timeout 1ms in the past */
+		t = Z_TIMEOUT_TICKS(Z_TICK_ABS(sys_clock_tick_get() - K_MSEC(1).ticks));
 
-	/* Absolute timeout 10ms in the future */
-	t = Z_TIMEOUT_TICKS(Z_TICK_ABS(sys_clock_tick_get() + K_MSEC(10).ticks));
-	exp_ticks = z_nrf_grtc_timer_read() + K_MSEC(10).ticks;
-	ticks = z_nrf_grtc_timer_get_ticks(t);
-	zassert_true((ticks >= exp_ticks) && (ticks <= (exp_ticks + GRTC_SLEW_TICKS)),
-		     "Unexpected result %" PRId64 " (expected: %" PRId64 ")", ticks, exp_ticks);
+		exp_ticks = z_nrf_grtc_timer_read() - K_MSEC(1).ticks * CYC_PER_TICK;
+		ticks = z_nrf_grtc_timer_get_ticks(t);
+		zassert_true((ticks >= (exp_ticks - CYC_PER_TICK + 1)) &&
+				     (ticks <= (exp_ticks + GRTC_SLEW_TICKS)),
+			     "Unexpected result %" PRId64 " (expected: %" PRId64 ")", ticks,
+			     exp_ticks);
+
+		/* Absolute timeout 10ms in the future */
+		t = Z_TIMEOUT_TICKS(Z_TICK_ABS(sys_clock_tick_get() + K_MSEC(10).ticks));
+		exp_ticks = z_nrf_grtc_timer_read() + K_MSEC(10).ticks * CYC_PER_TICK;
+		ticks = z_nrf_grtc_timer_get_ticks(t);
+		zassert_true((ticks >= (exp_ticks - CYC_PER_TICK + 1)) &&
+				     (ticks <= (exp_ticks + GRTC_SLEW_TICKS)),
+			     "Unexpected result %" PRId64 " (expected: %" PRId64 ")", ticks,
+			     exp_ticks);
+	}
 }
 
 ZTEST_SUITE(nrf_grtc_timer, NULL, NULL, NULL, NULL, NULL);
diff --git a/tests/drivers/timer/nrf_grtc_timer/testcase.yaml b/tests/drivers/timer/nrf_grtc_timer/testcase.yaml
index e81a37cbd2a..3b93b157012 100644
--- a/tests/drivers/timer/nrf_grtc_timer/testcase.yaml
+++ b/tests/drivers/timer/nrf_grtc_timer/testcase.yaml
@@ -4,5 +4,6 @@ tests:
     platform_allow:
       - nrf54l15pdk/nrf54l15/cpuapp
       - nrf54l15pdk/nrf54l15/cpuflpr
+      - nrf54l15bsim/nrf54l15/cpuapp
       - nrf54h20dk/nrf54h20/cpuapp
       - nrf54h20dk/nrf54h20/cpurad