diff --git a/tests/gswe-timestamp-test.c b/tests/gswe-timestamp-test.c
index 2d79605..cf70786 100644
--- a/tests/gswe-timestamp-test.c
+++ b/tests/gswe-timestamp-test.c
@@ -4,13 +4,20 @@
 #include <glib-object.h>
 #include <swe-glib.h>
 
+#include "test-asserts.h"
+
 static void
 test_timestamp_jd(void)
 {
     GsweTimestamp *timestamp;
-    gdouble jd;
+    gdouble jd,
+            seconds;
 
-    timestamp = gswe_timestamp_new_from_gregorian_full(1983, 3, 7, 11, 54, 45, 0, 1.0);
+    timestamp = gswe_timestamp_new_from_gregorian_full(
+            1983, 3, 7,
+            11, 54, 45, 0,
+            1.0
+        );
     g_assert(timestamp);
 
     jd = gswe_timestamp_get_julian_day_et(timestamp, NULL);
@@ -19,16 +26,44 @@ test_timestamp_jd(void)
 
     timestamp = gswe_timestamp_new_from_julian_day(jd);
     g_assert(timestamp);
-    g_assert(gswe_timestamp_get_gregorian_timezone(timestamp) == 1.0);
-    g_assert(gswe_timestamp_get_gregorian_year(timestamp, NULL) == 1983);
-    g_assert(gswe_timestamp_get_gregorian_month(timestamp, NULL) == 3);
-    g_assert(gswe_timestamp_get_gregorian_day(timestamp, NULL) == 7);
-    g_assert(gswe_timestamp_get_gregorian_hour(timestamp, NULL) == 11);
-    g_assert(gswe_timestamp_get_gregorian_minute(timestamp, NULL) == 54);
-    /* The next two lines seem to provide an inaccurate result due to floating
-     * point inaccuracies (may give 44.999999 instead of 45.0) */
-//    g_assert(gswe_timestamp_get_gregorian_second(timestamp, NULL) == 45);
-//    g_assert(gswe_timestamp_get_gregorian_microsecond(timestamp, NULL) == 0);
+    gswe_timestamp_set_gregorian_timezone(timestamp, 1.0, NULL);
+    g_assert_cmpfloat(
+            gswe_timestamp_get_gregorian_timezone(timestamp),
+            ==,
+            1.0
+        );
+    g_assert_cmpint(
+            gswe_timestamp_get_gregorian_year(timestamp, NULL),
+            ==,
+            1983
+        );
+    g_assert_cmpuint(
+            gswe_timestamp_get_gregorian_month(timestamp, NULL),
+            ==,
+            3
+        );
+    g_assert_cmpuint(gswe_timestamp_get_gregorian_day(timestamp, NULL), ==, 7);
+    g_assert_cmpuint(
+            gswe_timestamp_get_gregorian_hour(timestamp, NULL),
+            ==,
+            11
+        );
+    g_assert_cmpuint(
+            gswe_timestamp_get_gregorian_minute(timestamp, NULL),
+            ==,
+            54
+        );
+
+    seconds =
+        gswe_timestamp_get_gregorian_second(timestamp, NULL)
+        + gswe_timestamp_get_gregorian_microsecond(timestamp, NULL) / 1000.0;
+
+    /* Due to floating point errors, we allow 5 microseconds fuzzyness here */
+    gswe_assert_fuzzy_equals(
+            seconds,
+            45.0,
+            0.005
+        );
 }
 
 int
diff --git a/tests/test-asserts.h b/tests/test-asserts.h
new file mode 100644
index 0000000..756d107
--- /dev/null
+++ b/tests/test-asserts.h
@@ -0,0 +1,27 @@
+#ifndef __SWE_GLIB_TEST_ASSERTS_H__
+#define __SWE_GLIB_TEST_ASSERTS_H__
+
+#include <glib.h>
+
+/* Check equality with fuzzyness. Thanks for ebassi@GNOME and graphene */
+#define gswe_assert_fuzzy_equals(n1,n2,epsilon) \
+  G_STMT_START { \
+    typeof ((n1)) __n1 = (n1); \
+    typeof ((n2)) __n2 = (n2); \
+    typeof ((epsilon)) __epsilon = (epsilon); \
+    if (__n1 > __n2) { \
+      if ((__n1 - __n2) <= __epsilon) ; else { \
+        g_assertion_message_cmpnum (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
+                                    #n1 " == " #n2 " (+/- " #epsilon ")", \
+                                    __n1, "==", __n2, 'f'); \
+      } \
+    } else { \
+      if ((__n2 - __n1) <= __epsilon) ; else { \
+        g_assertion_message_cmpnum (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
+                                    #n1 " == " #n2 " (+/- " #epsilon ")", \
+                                    __n1, "==", __n2, 'f'); \
+      } \
+    } \
+  } G_STMT_END
+
+#endif /* __SWE_GLIB_TEST_ASSERTS_H__ */