diff --git a/tests/bson-corpus/decimal128-1-valid-057.phpt b/tests/bson-corpus/decimal128-1-valid-057.phpt
new file mode 100644
index 000000000..0a59ab729
--- /dev/null
+++ b/tests/bson-corpus/decimal128-1-valid-057.phpt
@@ -0,0 +1,52 @@
+--TEST--
+Decimal128: Clamped zeros with a large positive exponent
+--DESCRIPTION--
+Generated by scripts/convert-bson-corpus-tests.php
+
+DO NOT EDIT THIS FILE
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/basic.inc';
+
+$canonicalBson = hex2bin('180000001364000000000000000000000000000000FE5F00');
+$canonicalExtJson = '{"d" : {"$numberDecimal" : "0E+6111"}}';
+$degenerateExtJson = '{"d" : {"$numberDecimal" : "0E+2147483647"}}';
+
+// Canonical BSON -> Native -> Canonical BSON
+echo bin2hex(fromPHP(toPHP($canonicalBson))), "\n";
+
+// Canonical BSON -> BSON object -> Canonical BSON
+echo bin2hex((string) MongoDB\BSON\Document::fromBSON($canonicalBson)), "\n";
+
+// Canonical BSON -> Canonical extJSON
+echo json_canonicalize(toCanonicalExtendedJSON($canonicalBson)), "\n";
+
+// Canonical BSON -> BSON object -> Canonical extJSON
+echo json_canonicalize(MongoDB\BSON\Document::fromBSON($canonicalBson)->toCanonicalExtendedJSON()), "\n";
+
+// Canonical extJSON -> Canonical BSON
+echo bin2hex(fromJSON($canonicalExtJson)), "\n";
+
+// Canonical extJSON -> BSON object -> Canonical BSON
+echo bin2hex((string) MongoDB\BSON\Document::fromJSON($canonicalExtJson)), "\n";
+
+// Degenerate extJSON -> Canonical BSON
+echo bin2hex(fromJSON($degenerateExtJson)), "\n";
+
+// Degenerate extJSON -> BSON object -> Canonical BSON
+echo bin2hex((string) MongoDB\BSON\Document::fromJSON($degenerateExtJson)), "\n";
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECT--
+180000001364000000000000000000000000000000fe5f00
+180000001364000000000000000000000000000000fe5f00
+{"d":{"$numberDecimal":"0E+6111"}}
+{"d":{"$numberDecimal":"0E+6111"}}
+180000001364000000000000000000000000000000fe5f00
+180000001364000000000000000000000000000000fe5f00
+180000001364000000000000000000000000000000fe5f00
+180000001364000000000000000000000000000000fe5f00
+===DONE===
\ No newline at end of file
diff --git a/tests/bson-corpus/decimal128-1-valid-058.phpt b/tests/bson-corpus/decimal128-1-valid-058.phpt
new file mode 100644
index 000000000..2ca34e65d
--- /dev/null
+++ b/tests/bson-corpus/decimal128-1-valid-058.phpt
@@ -0,0 +1,52 @@
+--TEST--
+Decimal128: Clamped zeros with a large negative exponent
+--DESCRIPTION--
+Generated by scripts/convert-bson-corpus-tests.php
+
+DO NOT EDIT THIS FILE
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/basic.inc';
+
+$canonicalBson = hex2bin('180000001364000000000000000000000000000000000000');
+$canonicalExtJson = '{"d" : {"$numberDecimal" : "0E-6176"}}';
+$degenerateExtJson = '{"d" : {"$numberDecimal" : "0E-2147483647"}}';
+
+// Canonical BSON -> Native -> Canonical BSON
+echo bin2hex(fromPHP(toPHP($canonicalBson))), "\n";
+
+// Canonical BSON -> BSON object -> Canonical BSON
+echo bin2hex((string) MongoDB\BSON\Document::fromBSON($canonicalBson)), "\n";
+
+// Canonical BSON -> Canonical extJSON
+echo json_canonicalize(toCanonicalExtendedJSON($canonicalBson)), "\n";
+
+// Canonical BSON -> BSON object -> Canonical extJSON
+echo json_canonicalize(MongoDB\BSON\Document::fromBSON($canonicalBson)->toCanonicalExtendedJSON()), "\n";
+
+// Canonical extJSON -> Canonical BSON
+echo bin2hex(fromJSON($canonicalExtJson)), "\n";
+
+// Canonical extJSON -> BSON object -> Canonical BSON
+echo bin2hex((string) MongoDB\BSON\Document::fromJSON($canonicalExtJson)), "\n";
+
+// Degenerate extJSON -> Canonical BSON
+echo bin2hex(fromJSON($degenerateExtJson)), "\n";
+
+// Degenerate extJSON -> BSON object -> Canonical BSON
+echo bin2hex((string) MongoDB\BSON\Document::fromJSON($degenerateExtJson)), "\n";
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECT--
+180000001364000000000000000000000000000000000000
+180000001364000000000000000000000000000000000000
+{"d":{"$numberDecimal":"0E-6176"}}
+{"d":{"$numberDecimal":"0E-6176"}}
+180000001364000000000000000000000000000000000000
+180000001364000000000000000000000000000000000000
+180000001364000000000000000000000000000000000000
+180000001364000000000000000000000000000000000000
+===DONE===
\ No newline at end of file
diff --git a/tests/bson-corpus/decimal128-1-valid-059.phpt b/tests/bson-corpus/decimal128-1-valid-059.phpt
new file mode 100644
index 000000000..778a99c71
--- /dev/null
+++ b/tests/bson-corpus/decimal128-1-valid-059.phpt
@@ -0,0 +1,52 @@
+--TEST--
+Decimal128: Clamped negative zeros with a large positive exponent
+--DESCRIPTION--
+Generated by scripts/convert-bson-corpus-tests.php
+
+DO NOT EDIT THIS FILE
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/basic.inc';
+
+$canonicalBson = hex2bin('180000001364000000000000000000000000000000FEDF00');
+$canonicalExtJson = '{"d" : {"$numberDecimal" : "-0E+6111"}}';
+$degenerateExtJson = '{"d" : {"$numberDecimal" : "-0E+2147483647"}}';
+
+// Canonical BSON -> Native -> Canonical BSON
+echo bin2hex(fromPHP(toPHP($canonicalBson))), "\n";
+
+// Canonical BSON -> BSON object -> Canonical BSON
+echo bin2hex((string) MongoDB\BSON\Document::fromBSON($canonicalBson)), "\n";
+
+// Canonical BSON -> Canonical extJSON
+echo json_canonicalize(toCanonicalExtendedJSON($canonicalBson)), "\n";
+
+// Canonical BSON -> BSON object -> Canonical extJSON
+echo json_canonicalize(MongoDB\BSON\Document::fromBSON($canonicalBson)->toCanonicalExtendedJSON()), "\n";
+
+// Canonical extJSON -> Canonical BSON
+echo bin2hex(fromJSON($canonicalExtJson)), "\n";
+
+// Canonical extJSON -> BSON object -> Canonical BSON
+echo bin2hex((string) MongoDB\BSON\Document::fromJSON($canonicalExtJson)), "\n";
+
+// Degenerate extJSON -> Canonical BSON
+echo bin2hex(fromJSON($degenerateExtJson)), "\n";
+
+// Degenerate extJSON -> BSON object -> Canonical BSON
+echo bin2hex((string) MongoDB\BSON\Document::fromJSON($degenerateExtJson)), "\n";
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECT--
+180000001364000000000000000000000000000000fedf00
+180000001364000000000000000000000000000000fedf00
+{"d":{"$numberDecimal":"-0E+6111"}}
+{"d":{"$numberDecimal":"-0E+6111"}}
+180000001364000000000000000000000000000000fedf00
+180000001364000000000000000000000000000000fedf00
+180000001364000000000000000000000000000000fedf00
+180000001364000000000000000000000000000000fedf00
+===DONE===
\ No newline at end of file
diff --git a/tests/bson-corpus/decimal128-1-valid-060.phpt b/tests/bson-corpus/decimal128-1-valid-060.phpt
new file mode 100644
index 000000000..462fc0a81
--- /dev/null
+++ b/tests/bson-corpus/decimal128-1-valid-060.phpt
@@ -0,0 +1,52 @@
+--TEST--
+Decimal128: Clamped negative zeros with a large negative exponent
+--DESCRIPTION--
+Generated by scripts/convert-bson-corpus-tests.php
+
+DO NOT EDIT THIS FILE
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/basic.inc';
+
+$canonicalBson = hex2bin('180000001364000000000000000000000000000000008000');
+$canonicalExtJson = '{"d" : {"$numberDecimal" : "-0E-6176"}}';
+$degenerateExtJson = '{"d" : {"$numberDecimal" : "-0E-2147483647"}}';
+
+// Canonical BSON -> Native -> Canonical BSON
+echo bin2hex(fromPHP(toPHP($canonicalBson))), "\n";
+
+// Canonical BSON -> BSON object -> Canonical BSON
+echo bin2hex((string) MongoDB\BSON\Document::fromBSON($canonicalBson)), "\n";
+
+// Canonical BSON -> Canonical extJSON
+echo json_canonicalize(toCanonicalExtendedJSON($canonicalBson)), "\n";
+
+// Canonical BSON -> BSON object -> Canonical extJSON
+echo json_canonicalize(MongoDB\BSON\Document::fromBSON($canonicalBson)->toCanonicalExtendedJSON()), "\n";
+
+// Canonical extJSON -> Canonical BSON
+echo bin2hex(fromJSON($canonicalExtJson)), "\n";
+
+// Canonical extJSON -> BSON object -> Canonical BSON
+echo bin2hex((string) MongoDB\BSON\Document::fromJSON($canonicalExtJson)), "\n";
+
+// Degenerate extJSON -> Canonical BSON
+echo bin2hex(fromJSON($degenerateExtJson)), "\n";
+
+// Degenerate extJSON -> BSON object -> Canonical BSON
+echo bin2hex((string) MongoDB\BSON\Document::fromJSON($degenerateExtJson)), "\n";
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECT--
+180000001364000000000000000000000000000000008000
+180000001364000000000000000000000000000000008000
+{"d":{"$numberDecimal":"-0E-6176"}}
+{"d":{"$numberDecimal":"-0E-6176"}}
+180000001364000000000000000000000000000000008000
+180000001364000000000000000000000000000000008000
+180000001364000000000000000000000000000000008000
+180000001364000000000000000000000000000000008000
+===DONE===
\ No newline at end of file