diff --git a/ext/standard/tests/math/round_modes.phpt b/ext/standard/tests/math/round_modes.phpt
index 03479c4d908fe..23a0224efbca6 100644
--- a/ext/standard/tests/math/round_modes.phpt
+++ b/ext/standard/tests/math/round_modes.phpt
@@ -2,37 +2,286 @@
 round() with different rounding modes
 --FILE--
 <?php
-var_dump (round (2.5, 0, PHP_ROUND_HALF_UP));
-var_dump (round (2.5, 0, PHP_ROUND_HALF_DOWN));
-var_dump (round (2.5, 0, PHP_ROUND_HALF_EVEN));
-var_dump (round (2.5, 0, PHP_ROUND_HALF_ODD));
-var_dump (round (-2.5, 0, PHP_ROUND_HALF_UP));
-var_dump (round (-2.5, 0, PHP_ROUND_HALF_DOWN));
-var_dump (round (-2.5, 0, PHP_ROUND_HALF_EVEN));
-var_dump (round (-2.5, 0, PHP_ROUND_HALF_ODD));
-var_dump (round (3.5, 0, PHP_ROUND_HALF_UP));
-var_dump (round (3.5, 0, PHP_ROUND_HALF_DOWN));
-var_dump (round (3.5, 0, PHP_ROUND_HALF_EVEN));
-var_dump (round (3.5, 0, PHP_ROUND_HALF_ODD));
-var_dump (round (-3.5, 0, PHP_ROUND_HALF_UP));
-var_dump (round (-3.5, 0, PHP_ROUND_HALF_DOWN));
-var_dump (round (-3.5, 0, PHP_ROUND_HALF_EVEN));
-var_dump (round (-3.5, 0, PHP_ROUND_HALF_ODD));
+$modes = [
+    "PHP_ROUND_HALF_UP" => PHP_ROUND_HALF_UP,
+    "PHP_ROUND_HALF_DOWN" => PHP_ROUND_HALF_DOWN,
+    "PHP_ROUND_HALF_EVEN" => PHP_ROUND_HALF_EVEN,
+    "PHP_ROUND_HALF_ODD" => PHP_ROUND_HALF_ODD,
+];
+
+$numbers = [
+    2.5,
+    -2.5,
+    3.5,
+    -3.5,
+    7,
+    -7,
+    0.61,
+    0.69,
+    0,
+    1.9999,
+    -1.9999,
+    0.0001,
+    -0.0001,
+];
+$precisions = [0, 1, 2, 10];
+
+foreach ($modes as $modeKey => $mode) {
+    echo "mode: $modeKey\n";
+    foreach ($precisions as $precision) {
+        echo "\tprecision: $precision\n";
+        foreach ($numbers as $number) {
+            $result = round($number, $precision);
+            echo "\t\t" .
+                str_pad($number, 7, " ", STR_PAD_LEFT) .
+                " => $result\n";
+        }
+        echo "\n";
+    }
+}
+
 ?>
 --EXPECT--
-float(3)
-float(2)
-float(2)
-float(3)
-float(-3)
-float(-2)
-float(-2)
-float(-3)
-float(4)
-float(3)
-float(4)
-float(3)
-float(-4)
-float(-3)
-float(-4)
-float(-3)
+mode: PHP_ROUND_HALF_UP
+	precision: 0
+		    2.5 => 3
+		   -2.5 => -3
+		    3.5 => 4
+		   -3.5 => -4
+		      7 => 7
+		     -7 => -7
+		   0.61 => 1
+		   0.69 => 1
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 1
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.6
+		   0.69 => 0.7
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 2
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 10
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 1.9999
+		-1.9999 => -1.9999
+		 0.0001 => 0.0001
+		-0.0001 => -0.0001
+
+mode: PHP_ROUND_HALF_DOWN
+	precision: 0
+		    2.5 => 3
+		   -2.5 => -3
+		    3.5 => 4
+		   -3.5 => -4
+		      7 => 7
+		     -7 => -7
+		   0.61 => 1
+		   0.69 => 1
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 1
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.6
+		   0.69 => 0.7
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 2
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 10
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 1.9999
+		-1.9999 => -1.9999
+		 0.0001 => 0.0001
+		-0.0001 => -0.0001
+
+mode: PHP_ROUND_HALF_EVEN
+	precision: 0
+		    2.5 => 3
+		   -2.5 => -3
+		    3.5 => 4
+		   -3.5 => -4
+		      7 => 7
+		     -7 => -7
+		   0.61 => 1
+		   0.69 => 1
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 1
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.6
+		   0.69 => 0.7
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 2
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 10
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 1.9999
+		-1.9999 => -1.9999
+		 0.0001 => 0.0001
+		-0.0001 => -0.0001
+
+mode: PHP_ROUND_HALF_ODD
+	precision: 0
+		    2.5 => 3
+		   -2.5 => -3
+		    3.5 => 4
+		   -3.5 => -4
+		      7 => 7
+		     -7 => -7
+		   0.61 => 1
+		   0.69 => 1
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 1
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.6
+		   0.69 => 0.7
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 2
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 2
+		-1.9999 => -2
+		 0.0001 => 0
+		-0.0001 => -0
+
+	precision: 10
+		    2.5 => 2.5
+		   -2.5 => -2.5
+		    3.5 => 3.5
+		   -3.5 => -3.5
+		      7 => 7
+		     -7 => -7
+		   0.61 => 0.61
+		   0.69 => 0.69
+		      0 => 0
+		 1.9999 => 1.9999
+		-1.9999 => -1.9999
+		 0.0001 => 0.0001
+		-0.0001 => -0.0001