diff --git a/nebulosa-test/src/main/kotlin/nebulosa/test/Http.kt b/nebulosa-test/src/main/kotlin/nebulosa/test/Http.kt
index fc6bb6cf3..3360d6d70 100644
--- a/nebulosa-test/src/main/kotlin/nebulosa/test/Http.kt
+++ b/nebulosa-test/src/main/kotlin/nebulosa/test/Http.kt
@@ -40,6 +40,8 @@ fun download(url: String, extension: String = url.extensionFromUrl): Path {
             call.execute().use {
                 it.body?.byteStream()?.transferAndCloseOutput(path.outputStream())
             }
+        } else {
+            println("$path is already downloaded")
         }
 
         path
diff --git a/nebulosa-time/src/test/kotlin/IERSTest.kt b/nebulosa-time/src/test/kotlin/IERSTest.kt
index 36f6745c0..5c455f97a 100644
--- a/nebulosa-time/src/test/kotlin/IERSTest.kt
+++ b/nebulosa-time/src/test/kotlin/IERSTest.kt
@@ -12,15 +12,15 @@ class IERSTest {
         IERS.attach(IERSA)
 
         with(UTC(TimeYMDHMS(2022, 1, 1, 12, 0, 0.0)).ut1) {
-            whole shouldBe (2459581.0 plusOrMinus 1E-18)
-            fraction shouldBe (-1.2784074073774842e-06 plusOrMinus 1E-18)
+            whole shouldBe (2459581.0 plusOrMinus 1E-8)
+            fraction shouldBe (-1.2784074073774842e-06 plusOrMinus 1E-8)
         }
         with(UTC(TimeYMDHMS(2026, 1, 1, 12, 0, 0.0)).ut1) {
-            whole shouldBe (2461042.0 plusOrMinus 1E-18)
-            fraction shouldBe (1.1488645833633137E-6 plusOrMinus 1E-18)
+            whole shouldBe (2461042.0 plusOrMinus 1E-8)
+            fraction shouldBe (1.1488645833633137E-6 plusOrMinus 1E-8)
         }
         with(UTC(TimeYMDHMS(1964, 1, 1, 12, 0, 0.0)).ut1) {
-            whole shouldBe (2438396.0 plusOrMinus 1E-18)
+            whole shouldBe (2438396.0 plusOrMinus 1E-8)
             fraction shouldBe (9.353564814864956e-06 plusOrMinus 1E-8)
         }
     }
@@ -30,15 +30,15 @@ class IERSTest {
         IERS.attach(IERSB)
 
         with(UTC(TimeYMDHMS(2022, 1, 1, 12, 0, 0.0)).ut1) {
-            whole shouldBe (2459581.0 plusOrMinus 1E-18)
-            fraction shouldBe (-1.2782876157107722e-06 plusOrMinus 1E-18)
+            whole shouldBe (2459581.0 plusOrMinus 1E-8)
+            fraction shouldBe (-1.2782876157107722E-6 plusOrMinus 1E-8)
         }
         with(UTC(TimeYMDHMS(2026, 1, 1, 12, 0, 0.0)).ut1) {
-            whole shouldBe (2461042.0 plusOrMinus 1E-18)
-            fraction shouldBe (6.586666666966254E-7 plusOrMinus 1E-18)
+            whole shouldBe (2461042.0 plusOrMinus 1E-8)
+            fraction shouldBe (6.586666666966254E-7 plusOrMinus 1E-8)
         }
         with(UTC(TimeYMDHMS(1964, 1, 1, 12, 0, 0.0)).ut1) {
-            whole shouldBe (2438396.0 plusOrMinus 1E-18)
+            whole shouldBe (2438396.0 plusOrMinus 1E-8)
             fraction shouldBe (-9.322685184683761e-07 plusOrMinus 1E-8)
         }
     }
@@ -49,15 +49,15 @@ class IERSTest {
         IERS.attach(iersab)
 
         with(UTC(TimeYMDHMS(2022, 1, 1, 12, 0, 0.0)).ut1) {
-            whole shouldBe (2459581.0 plusOrMinus 1E-18)
-            fraction shouldBe (-1.2782876157107722e-06 plusOrMinus 1E-18)
+            whole shouldBe (2459581.0 plusOrMinus 1E-8)
+            fraction shouldBe (-1.2782876157107722e-06 plusOrMinus 1E-8)
         }
         with(UTC(TimeYMDHMS(2026, 1, 1, 12, 0, 0.0)).ut1) {
-            whole shouldBe (2461042.0 plusOrMinus 1E-18)
-            fraction shouldBe (1.1488645833633137E-6 plusOrMinus 1E-18)
+            whole shouldBe (2461042.0 plusOrMinus 1E-8)
+            fraction shouldBe (1.1488645833633137E-6 plusOrMinus 1E-8)
         }
         with(UTC(TimeYMDHMS(1964, 1, 1, 12, 0, 0.0)).ut1) {
-            whole shouldBe (2438396.0 plusOrMinus 1E-18)
+            whole shouldBe (2438396.0 plusOrMinus 1E-8)
             fraction shouldBe (-9.322685184683761e-07 plusOrMinus 1E-8)
         }
     }
diff --git a/nebulosa-time/src/test/kotlin/SystemClockTest.kt b/nebulosa-time/src/test/kotlin/SystemClockTest.kt
index 3b06cb7dc..31584edda 100644
--- a/nebulosa-time/src/test/kotlin/SystemClockTest.kt
+++ b/nebulosa-time/src/test/kotlin/SystemClockTest.kt
@@ -1,3 +1,4 @@
+import io.kotest.matchers.longs.shouldBeExactly
 import io.kotest.matchers.longs.shouldBeLessThanOrEqual
 import io.kotest.matchers.types.shouldBeSameInstanceAs
 import nebulosa.time.SystemClock
@@ -11,12 +12,12 @@ class SystemClockTest {
 
     @Test
     fun systemDefault() {
-        ChronoUnit.MICROS.between(LocalDateTime.now(SystemClock), LocalDateTime.now()) shouldBeLessThanOrEqual 20000L
+        ChronoUnit.SECONDS.between(LocalDateTime.now(SystemClock), LocalDateTime.now()) shouldBeExactly 0L
         SystemClock.zone shouldBeSameInstanceAs ZoneId.systemDefault()
 
         TimeZone.setDefault(TimeZone.getTimeZone("America/Manaus"))
 
-        ChronoUnit.MICROS.between(LocalDateTime.now(SystemClock), LocalDateTime.now()) shouldBeLessThanOrEqual 20000L
+        ChronoUnit.SECONDS.between(LocalDateTime.now(SystemClock), LocalDateTime.now()) shouldBeExactly 0L
         SystemClock.zone shouldBeSameInstanceAs ZoneId.systemDefault()
     }
 }