diff --git a/config.m4 b/config.m4
index 891c2fb41..419fcebe3 100644
--- a/config.m4
+++ b/config.m4
@@ -385,7 +385,7 @@ if test "$PHP_MONGODB" != "no"; then
     PHP_MONGODB_JSONSL_SOURCES="jsonsl.c"
 
     dnl Generated with: find src/libmongoc/src/libmongoc/src/mongoc -name '*.c' -print0 | cut -sz -d / -f 7- | sort -dz | tr '\000' ' '
-    PHP_MONGODB_MONGOC_SOURCES="mongoc-aggregate.c mongoc-apm.c mongoc-array.c mongoc-async.c mongoc-async-cmd.c mongoc-buffer.c mongoc-bulk-operation.c mongoc-change-stream.c mongoc-client.c mongoc-client-pool.c mongoc-client-session.c mongoc-client-side-encryption.c mongoc-cluster-aws.c mongoc-cluster.c mongoc-cluster-cyrus.c mongoc-cluster-sasl.c mongoc-cluster-sspi.c mongoc-cmd.c mongoc-collection.c mongoc-compression.c mongoc-counters.c mongoc-crypt.c mongoc-crypto.c mongoc-crypto-cng.c mongoc-crypto-common-crypto.c mongoc-crypto-openssl.c mongoc-cursor-array.c mongoc-cursor.c mongoc-cursor-change-stream.c mongoc-cursor-cmd.c mongoc-cursor-cmd-deprecated.c mongoc-cursor-find.c mongoc-cursor-find-cmd.c mongoc-cursor-find-opquery.c mongoc-cursor-legacy.c mongoc-cyrus.c mongoc-database.c mongoc-error.c mongoc-find-and-modify.c mongoc-gridfs-bucket.c mongoc-gridfs-bucket-file.c mongoc-gridfs.c mongoc-gridfs-file.c mongoc-gridfs-file-list.c mongoc-gridfs-file-page.c mongoc-handshake.c mongoc-host-list.c mongoc-http.c mongoc-index.c mongoc-init.c mongoc-interrupt.c mongoc-libressl.c mongoc-linux-distro-scanner.c mongoc-list.c mongoc-log.c mongoc-matcher.c mongoc-matcher-op.c mongoc-memcmp.c mongoc-ocsp-cache.c mongoc-openssl.c mongoc-opts.c mongoc-opts-helpers.c mongoc-queue.c mongoc-rand-cng.c mongoc-rand-common-crypto.c mongoc-rand-openssl.c mongoc-read-concern.c mongoc-read-prefs.c mongoc-rpc.c mongoc-sasl.c mongoc-scram.c mongoc-secure-channel.c mongoc-secure-transport.c mongoc-server-api.c mongoc-server-description.c mongoc-server-monitor.c mongoc-server-stream.c mongoc-set.c mongoc-socket.c mongoc-ssl.c mongoc-sspi.c mongoc-stream-buffered.c mongoc-stream.c mongoc-stream-file.c mongoc-stream-gridfs.c mongoc-stream-gridfs-download.c mongoc-stream-gridfs-upload.c mongoc-stream-socket.c mongoc-stream-tls.c mongoc-stream-tls-libressl.c mongoc-stream-tls-openssl-bio.c mongoc-stream-tls-openssl.c mongoc-stream-tls-secure-channel.c mongoc-stream-tls-secure-transport.c mongoc-timeout.c mongoc-topology-background-monitoring.c mongoc-topology.c mongoc-topology-description-apm.c mongoc-topology-description.c mongoc-topology-scanner.c mongoc-uri.c mongoc-util.c mongoc-version-functions.c mongoc-write-command.c mongoc-write-command-legacy.c mongoc-write-concern.c"
+    PHP_MONGODB_MONGOC_SOURCES="mongoc-aggregate.c mongoc-apm.c mongoc-array.c mongoc-async.c mongoc-async-cmd.c mongoc-buffer.c mongoc-bulk-operation.c mongoc-change-stream.c mongoc-client.c mongoc-client-pool.c mongoc-client-session.c mongoc-client-side-encryption.c mongoc-cluster-aws.c mongoc-cluster.c mongoc-cluster-cyrus.c mongoc-cluster-sasl.c mongoc-cluster-sspi.c mongoc-cmd.c mongoc-collection.c mongoc-compression.c mongoc-counters.c mongoc-crypt.c mongoc-crypto.c mongoc-crypto-cng.c mongoc-crypto-common-crypto.c mongoc-crypto-openssl.c mongoc-cursor-array.c mongoc-cursor.c mongoc-cursor-change-stream.c mongoc-cursor-cmd.c mongoc-cursor-cmd-deprecated.c mongoc-cursor-find.c mongoc-cursor-find-cmd.c mongoc-cursor-find-opquery.c mongoc-cursor-legacy.c mongoc-cyrus.c mongoc-database.c mongoc-error.c mongoc-find-and-modify.c mongoc-gridfs-bucket.c mongoc-gridfs-bucket-file.c mongoc-gridfs.c mongoc-gridfs-file.c mongoc-gridfs-file-list.c mongoc-gridfs-file-page.c mongoc-handshake.c mongoc-host-list.c mongoc-http.c mongoc-index.c mongoc-init.c mongoc-interrupt.c mongoc-libressl.c mongoc-linux-distro-scanner.c mongoc-list.c mongoc-log.c mongoc-matcher.c mongoc-matcher-op.c mongoc-memcmp.c mongoc-ocsp-cache.c mongoc-openssl.c mongoc-optional.c mongoc-opts.c mongoc-opts-helpers.c mongoc-queue.c mongoc-rand-cng.c mongoc-rand-common-crypto.c mongoc-rand-openssl.c mongoc-read-concern.c mongoc-read-prefs.c mongoc-rpc.c mongoc-sasl.c mongoc-scram.c mongoc-secure-channel.c mongoc-secure-transport.c mongoc-server-api.c mongoc-server-description.c mongoc-server-monitor.c mongoc-server-stream.c mongoc-set.c mongoc-socket.c mongoc-ssl.c mongoc-sspi.c mongoc-stream-buffered.c mongoc-stream.c mongoc-stream-file.c mongoc-stream-gridfs.c mongoc-stream-gridfs-download.c mongoc-stream-gridfs-upload.c mongoc-stream-socket.c mongoc-stream-tls.c mongoc-stream-tls-libressl.c mongoc-stream-tls-openssl-bio.c mongoc-stream-tls-openssl.c mongoc-stream-tls-secure-channel.c mongoc-stream-tls-secure-transport.c mongoc-timeout.c mongoc-topology-background-monitoring.c mongoc-topology.c mongoc-topology-description-apm.c mongoc-topology-description.c mongoc-topology-scanner.c mongoc-uri.c mongoc-util.c mongoc-version-functions.c mongoc-write-command.c mongoc-write-command-legacy.c mongoc-write-concern.c"
 
     dnl Generated with: find src/libmongoc/src/zlib-1.2.11 -maxdepth 1 -name '*.c' -print0 | cut -sz -d / -f 5- | sort -dz | tr '\000' ' '
     PHP_MONGODB_ZLIB_SOURCES="adler32.c compress.c crc32.c deflate.c gzclose.c gzlib.c gzread.c gzwrite.c infback.c inffast.c inflate.c inftrees.c trees.c uncompr.c zutil.c"
diff --git a/config.w32 b/config.w32
index e462c8b4f..0e24e8fef 100644
--- a/config.w32
+++ b/config.w32
@@ -115,7 +115,7 @@ if (PHP_MONGODB != "no") {
   var PHP_MONGODB_JSONSL_SOURCES="jsonsl.c";
 
   // Generated with: find src/libmongoc/src/libmongoc/src/mongoc -name '*.c' -print0 | cut -sz -d / -f 7- | sort -dz | tr '\000' ' '
-  var PHP_MONGODB_MONGOC_SOURCES="mongoc-aggregate.c mongoc-apm.c mongoc-array.c mongoc-async.c mongoc-async-cmd.c mongoc-buffer.c mongoc-bulk-operation.c mongoc-change-stream.c mongoc-client.c mongoc-client-pool.c mongoc-client-session.c mongoc-client-side-encryption.c mongoc-cluster-aws.c mongoc-cluster.c mongoc-cluster-cyrus.c mongoc-cluster-sasl.c mongoc-cluster-sspi.c mongoc-cmd.c mongoc-collection.c mongoc-compression.c mongoc-counters.c mongoc-crypt.c mongoc-crypto.c mongoc-crypto-cng.c mongoc-crypto-common-crypto.c mongoc-crypto-openssl.c mongoc-cursor-array.c mongoc-cursor.c mongoc-cursor-change-stream.c mongoc-cursor-cmd.c mongoc-cursor-cmd-deprecated.c mongoc-cursor-find.c mongoc-cursor-find-cmd.c mongoc-cursor-find-opquery.c mongoc-cursor-legacy.c mongoc-cyrus.c mongoc-database.c mongoc-error.c mongoc-find-and-modify.c mongoc-gridfs-bucket.c mongoc-gridfs-bucket-file.c mongoc-gridfs.c mongoc-gridfs-file.c mongoc-gridfs-file-list.c mongoc-gridfs-file-page.c mongoc-handshake.c mongoc-host-list.c mongoc-http.c mongoc-index.c mongoc-init.c mongoc-interrupt.c mongoc-libressl.c mongoc-linux-distro-scanner.c mongoc-list.c mongoc-log.c mongoc-matcher.c mongoc-matcher-op.c mongoc-memcmp.c mongoc-ocsp-cache.c mongoc-openssl.c mongoc-opts.c mongoc-opts-helpers.c mongoc-queue.c mongoc-rand-cng.c mongoc-rand-common-crypto.c mongoc-rand-openssl.c mongoc-read-concern.c mongoc-read-prefs.c mongoc-rpc.c mongoc-sasl.c mongoc-scram.c mongoc-secure-channel.c mongoc-secure-transport.c mongoc-server-api.c mongoc-server-description.c mongoc-server-monitor.c mongoc-server-stream.c mongoc-set.c mongoc-socket.c mongoc-ssl.c mongoc-sspi.c mongoc-stream-buffered.c mongoc-stream.c mongoc-stream-file.c mongoc-stream-gridfs.c mongoc-stream-gridfs-download.c mongoc-stream-gridfs-upload.c mongoc-stream-socket.c mongoc-stream-tls.c mongoc-stream-tls-libressl.c mongoc-stream-tls-openssl-bio.c mongoc-stream-tls-openssl.c mongoc-stream-tls-secure-channel.c mongoc-stream-tls-secure-transport.c mongoc-timeout.c mongoc-topology-background-monitoring.c mongoc-topology.c mongoc-topology-description-apm.c mongoc-topology-description.c mongoc-topology-scanner.c mongoc-uri.c mongoc-util.c mongoc-version-functions.c mongoc-write-command.c mongoc-write-command-legacy.c mongoc-write-concern.c";
+  var PHP_MONGODB_MONGOC_SOURCES="mongoc-aggregate.c mongoc-apm.c mongoc-array.c mongoc-async.c mongoc-async-cmd.c mongoc-buffer.c mongoc-bulk-operation.c mongoc-change-stream.c mongoc-client.c mongoc-client-pool.c mongoc-client-session.c mongoc-client-side-encryption.c mongoc-cluster-aws.c mongoc-cluster.c mongoc-cluster-cyrus.c mongoc-cluster-sasl.c mongoc-cluster-sspi.c mongoc-cmd.c mongoc-collection.c mongoc-compression.c mongoc-counters.c mongoc-crypt.c mongoc-crypto.c mongoc-crypto-cng.c mongoc-crypto-common-crypto.c mongoc-crypto-openssl.c mongoc-cursor-array.c mongoc-cursor.c mongoc-cursor-change-stream.c mongoc-cursor-cmd.c mongoc-cursor-cmd-deprecated.c mongoc-cursor-find.c mongoc-cursor-find-cmd.c mongoc-cursor-find-opquery.c mongoc-cursor-legacy.c mongoc-cyrus.c mongoc-database.c mongoc-error.c mongoc-find-and-modify.c mongoc-gridfs-bucket.c mongoc-gridfs-bucket-file.c mongoc-gridfs.c mongoc-gridfs-file.c mongoc-gridfs-file-list.c mongoc-gridfs-file-page.c mongoc-handshake.c mongoc-host-list.c mongoc-http.c mongoc-index.c mongoc-init.c mongoc-interrupt.c mongoc-libressl.c mongoc-linux-distro-scanner.c mongoc-list.c mongoc-log.c mongoc-matcher.c mongoc-matcher-op.c mongoc-memcmp.c mongoc-ocsp-cache.c mongoc-openssl.c mongoc-optional.c mongoc-opts.c mongoc-opts-helpers.c mongoc-queue.c mongoc-rand-cng.c mongoc-rand-common-crypto.c mongoc-rand-openssl.c mongoc-read-concern.c mongoc-read-prefs.c mongoc-rpc.c mongoc-sasl.c mongoc-scram.c mongoc-secure-channel.c mongoc-secure-transport.c mongoc-server-api.c mongoc-server-description.c mongoc-server-monitor.c mongoc-server-stream.c mongoc-set.c mongoc-socket.c mongoc-ssl.c mongoc-sspi.c mongoc-stream-buffered.c mongoc-stream.c mongoc-stream-file.c mongoc-stream-gridfs.c mongoc-stream-gridfs-download.c mongoc-stream-gridfs-upload.c mongoc-stream-socket.c mongoc-stream-tls.c mongoc-stream-tls-libressl.c mongoc-stream-tls-openssl-bio.c mongoc-stream-tls-openssl.c mongoc-stream-tls-secure-channel.c mongoc-stream-tls-secure-transport.c mongoc-timeout.c mongoc-topology-background-monitoring.c mongoc-topology.c mongoc-topology-description-apm.c mongoc-topology-description.c mongoc-topology-scanner.c mongoc-uri.c mongoc-util.c mongoc-version-functions.c mongoc-write-command.c mongoc-write-command-legacy.c mongoc-write-concern.c";
 
   EXTENSION("mongodb", "php_phongo.c phongo_compat.c", null, PHP_MONGODB_CFLAGS);
   MONGODB_ADD_SOURCES("/src", "bson.c bson-encode.c");
diff --git a/scripts/convert-bson-corpus-tests.php b/scripts/convert-bson-corpus-tests.php
index e68f3067e..ed7f5e4bc 100644
--- a/scripts/convert-bson-corpus-tests.php
+++ b/scripts/convert-bson-corpus-tests.php
@@ -238,6 +238,7 @@ function getParamsForParseError(array $test, array $case)
 
     switch ($test['bson_type']) {
         case '0x00': // Top-level document
+        case '0x05': // Binary
             $code = "throws(function() {\n";
             $code .= sprintf("    fromJSON(%s);\n", var_export($case['string'], true));
             $code .= "}, 'MongoDB\Driver\Exception\UnexpectedValueException');";
diff --git a/src/LIBMONGOC_VERSION_CURRENT b/src/LIBMONGOC_VERSION_CURRENT
index 230181a3f..9712dfd18 100644
--- a/src/LIBMONGOC_VERSION_CURRENT
+++ b/src/LIBMONGOC_VERSION_CURRENT
@@ -1 +1 @@
-1.18.0-20210317+git7b143c65af
+1.18.0-20210326+git203e6b9e26
diff --git a/src/libmongoc b/src/libmongoc
index 7b143c65a..203e6b9e2 160000
--- a/src/libmongoc
+++ b/src/libmongoc
@@ -1 +1 @@
-Subproject commit 7b143c65af27658fcb6e1480cdebf8bba3d37fe6
+Subproject commit 203e6b9e26bfce6ca76f1d087470c3840318afdd
diff --git a/tests/bson-corpus/binary-parseError-001.phpt b/tests/bson-corpus/binary-parseError-001.phpt
new file mode 100644
index 000000000..c73b941d6
--- /dev/null
+++ b/tests/bson-corpus/binary-parseError-001.phpt
@@ -0,0 +1,21 @@
+--TEST--
+Binary type: $uuid wrong type
+--DESCRIPTION--
+Generated by scripts/convert-bson-corpus-tests.php
+
+DO NOT EDIT THIS FILE
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/tools.php';
+
+throws(function() {
+    fromJSON('{"x" : { "$uuid" : { "data" : "73ffd264-44b3-4c69-90e8-e7d1dfc035d4"}}}');
+}, 'MongoDB\Driver\Exception\UnexpectedValueException');
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECT--
+OK: Got MongoDB\Driver\Exception\UnexpectedValueException
+===DONE===
\ No newline at end of file
diff --git a/tests/bson-corpus/binary-parseError-002.phpt b/tests/bson-corpus/binary-parseError-002.phpt
new file mode 100644
index 000000000..5d3c4e819
--- /dev/null
+++ b/tests/bson-corpus/binary-parseError-002.phpt
@@ -0,0 +1,21 @@
+--TEST--
+Binary type: $uuid invalid value--too short
+--DESCRIPTION--
+Generated by scripts/convert-bson-corpus-tests.php
+
+DO NOT EDIT THIS FILE
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/tools.php';
+
+throws(function() {
+    fromJSON('{"x" : { "$uuid" : "73ffd264-44b3-90e8-e7d1dfc035d4"}}');
+}, 'MongoDB\Driver\Exception\UnexpectedValueException');
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECT--
+OK: Got MongoDB\Driver\Exception\UnexpectedValueException
+===DONE===
\ No newline at end of file
diff --git a/tests/bson-corpus/binary-parseError-003.phpt b/tests/bson-corpus/binary-parseError-003.phpt
new file mode 100644
index 000000000..56df69b03
--- /dev/null
+++ b/tests/bson-corpus/binary-parseError-003.phpt
@@ -0,0 +1,21 @@
+--TEST--
+Binary type: $uuid invalid value--too long
+--DESCRIPTION--
+Generated by scripts/convert-bson-corpus-tests.php
+
+DO NOT EDIT THIS FILE
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/tools.php';
+
+throws(function() {
+    fromJSON('{"x" : { "$uuid" : "73ffd264-44b3-4c69-90e8-e7d1dfc035d4-789e4"}}');
+}, 'MongoDB\Driver\Exception\UnexpectedValueException');
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECT--
+OK: Got MongoDB\Driver\Exception\UnexpectedValueException
+===DONE===
\ No newline at end of file
diff --git a/tests/bson-corpus/binary-parseError-004.phpt b/tests/bson-corpus/binary-parseError-004.phpt
new file mode 100644
index 000000000..c087a5f24
--- /dev/null
+++ b/tests/bson-corpus/binary-parseError-004.phpt
@@ -0,0 +1,21 @@
+--TEST--
+Binary type: $uuid invalid value--misplaced hyphens
+--DESCRIPTION--
+Generated by scripts/convert-bson-corpus-tests.php
+
+DO NOT EDIT THIS FILE
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/tools.php';
+
+throws(function() {
+    fromJSON('{"x" : { "$uuid" : "73ff-d26444b-34c6-990e8e-7d1dfc035d4"}}');
+}, 'MongoDB\Driver\Exception\UnexpectedValueException');
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECT--
+OK: Got MongoDB\Driver\Exception\UnexpectedValueException
+===DONE===
\ No newline at end of file
diff --git a/tests/bson-corpus/binary-parseError-005.phpt b/tests/bson-corpus/binary-parseError-005.phpt
new file mode 100644
index 000000000..a9d1c7439
--- /dev/null
+++ b/tests/bson-corpus/binary-parseError-005.phpt
@@ -0,0 +1,21 @@
+--TEST--
+Binary type: $uuid invalid value--too many hyphens
+--DESCRIPTION--
+Generated by scripts/convert-bson-corpus-tests.php
+
+DO NOT EDIT THIS FILE
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/tools.php';
+
+throws(function() {
+    fromJSON('{"x" : { "$uuid" : "----d264-44b3-4--9-90e8-e7d1dfc0----"}}');
+}, 'MongoDB\Driver\Exception\UnexpectedValueException');
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECT--
+OK: Got MongoDB\Driver\Exception\UnexpectedValueException
+===DONE===
\ No newline at end of file
diff --git a/tests/bson-corpus/binary-valid-008.phpt b/tests/bson-corpus/binary-valid-008.phpt
index 5e660819d..60435d720 100644
--- a/tests/bson-corpus/binary-valid-008.phpt
+++ b/tests/bson-corpus/binary-valid-008.phpt
@@ -1,5 +1,5 @@
 --TEST--
-Binary type: subtype 0x05
+Binary type: subtype 0x04 UUID
 --DESCRIPTION--
 Generated by scripts/convert-bson-corpus-tests.php
 
@@ -9,8 +9,9 @@ DO NOT EDIT THIS FILE
 
 require_once __DIR__ . '/../utils/tools.php';
 
-$canonicalBson = hex2bin('1D000000057800100000000573FFD26444B34C6990E8E7D1DFC035D400');
-$canonicalExtJson = '{"x" : { "$binary" : {"base64" : "c//SZESzTGmQ6OfR38A11A==", "subType" : "05"}}}';
+$canonicalBson = hex2bin('1D000000057800100000000473FFD26444B34C6990E8E7D1DFC035D400');
+$canonicalExtJson = '{"x" : { "$binary" : {"base64" : "c//SZESzTGmQ6OfR38A11A==", "subType" : "04"}}}';
+$degenerateExtJson = '{"x" : { "$uuid" : "73ffd264-44b3-4c69-90e8-e7d1dfc035d4"}}';
 
 // Canonical BSON -> Native -> Canonical BSON
 echo bin2hex(fromPHP(toPHP($canonicalBson))), "\n";
@@ -21,11 +22,15 @@ echo json_canonicalize(toCanonicalExtendedJSON($canonicalBson)), "\n";
 // Canonical extJSON -> Canonical BSON
 echo bin2hex(fromJSON($canonicalExtJson)), "\n";
 
+// Degenerate extJSON -> Canonical BSON
+echo bin2hex(fromJSON($degenerateExtJson)), "\n";
+
 ?>
 ===DONE===
 <?php exit(0); ?>
 --EXPECT--
-1d000000057800100000000573ffd26444b34c6990e8e7d1dfc035d400
-{"x":{"$binary":{"base64":"c\/\/SZESzTGmQ6OfR38A11A==","subType":"05"}}}
-1d000000057800100000000573ffd26444b34c6990e8e7d1dfc035d400
+1d000000057800100000000473ffd26444b34c6990e8e7d1dfc035d400
+{"x":{"$binary":{"base64":"c\/\/SZESzTGmQ6OfR38A11A==","subType":"04"}}}
+1d000000057800100000000473ffd26444b34c6990e8e7d1dfc035d400
+1d000000057800100000000473ffd26444b34c6990e8e7d1dfc035d400
 ===DONE===
\ No newline at end of file
diff --git a/tests/bson-corpus/binary-valid-009.phpt b/tests/bson-corpus/binary-valid-009.phpt
index 34f9004fb..5e660819d 100644
--- a/tests/bson-corpus/binary-valid-009.phpt
+++ b/tests/bson-corpus/binary-valid-009.phpt
@@ -1,5 +1,5 @@
 --TEST--
-Binary type: subtype 0x80
+Binary type: subtype 0x05
 --DESCRIPTION--
 Generated by scripts/convert-bson-corpus-tests.php
 
@@ -9,8 +9,8 @@ DO NOT EDIT THIS FILE
 
 require_once __DIR__ . '/../utils/tools.php';
 
-$canonicalBson = hex2bin('0F0000000578000200000080FFFF00');
-$canonicalExtJson = '{"x" : { "$binary" : {"base64" : "//8=", "subType" : "80"}}}';
+$canonicalBson = hex2bin('1D000000057800100000000573FFD26444B34C6990E8E7D1DFC035D400');
+$canonicalExtJson = '{"x" : { "$binary" : {"base64" : "c//SZESzTGmQ6OfR38A11A==", "subType" : "05"}}}';
 
 // Canonical BSON -> Native -> Canonical BSON
 echo bin2hex(fromPHP(toPHP($canonicalBson))), "\n";
@@ -25,7 +25,7 @@ echo bin2hex(fromJSON($canonicalExtJson)), "\n";
 ===DONE===
 <?php exit(0); ?>
 --EXPECT--
-0f0000000578000200000080ffff00
-{"x":{"$binary":{"base64":"\/\/8=","subType":"80"}}}
-0f0000000578000200000080ffff00
+1d000000057800100000000573ffd26444b34c6990e8e7d1dfc035d400
+{"x":{"$binary":{"base64":"c\/\/SZESzTGmQ6OfR38A11A==","subType":"05"}}}
+1d000000057800100000000573ffd26444b34c6990e8e7d1dfc035d400
 ===DONE===
\ No newline at end of file
diff --git a/tests/bson-corpus/binary-valid-010.phpt b/tests/bson-corpus/binary-valid-010.phpt
index 123b2607a..34f9004fb 100644
--- a/tests/bson-corpus/binary-valid-010.phpt
+++ b/tests/bson-corpus/binary-valid-010.phpt
@@ -1,5 +1,5 @@
 --TEST--
-Binary type: $type query operator (conflicts with legacy $binary form with $type field)
+Binary type: subtype 0x80
 --DESCRIPTION--
 Generated by scripts/convert-bson-corpus-tests.php
 
@@ -9,8 +9,8 @@ DO NOT EDIT THIS FILE
 
 require_once __DIR__ . '/../utils/tools.php';
 
-$canonicalBson = hex2bin('1F000000037800170000000224747970650007000000737472696E67000000');
-$canonicalExtJson = '{"x" : { "$type" : "string"}}';
+$canonicalBson = hex2bin('0F0000000578000200000080FFFF00');
+$canonicalExtJson = '{"x" : { "$binary" : {"base64" : "//8=", "subType" : "80"}}}';
 
 // Canonical BSON -> Native -> Canonical BSON
 echo bin2hex(fromPHP(toPHP($canonicalBson))), "\n";
@@ -25,7 +25,7 @@ echo bin2hex(fromJSON($canonicalExtJson)), "\n";
 ===DONE===
 <?php exit(0); ?>
 --EXPECT--
-1f000000037800170000000224747970650007000000737472696e67000000
-{"x":{"$type":"string"}}
-1f000000037800170000000224747970650007000000737472696e67000000
+0f0000000578000200000080ffff00
+{"x":{"$binary":{"base64":"\/\/8=","subType":"80"}}}
+0f0000000578000200000080ffff00
 ===DONE===
\ No newline at end of file
diff --git a/tests/bson-corpus/binary-valid-011.phpt b/tests/bson-corpus/binary-valid-011.phpt
index a60283202..123b2607a 100644
--- a/tests/bson-corpus/binary-valid-011.phpt
+++ b/tests/bson-corpus/binary-valid-011.phpt
@@ -9,8 +9,8 @@ DO NOT EDIT THIS FILE
 
 require_once __DIR__ . '/../utils/tools.php';
 
-$canonicalBson = hex2bin('180000000378001000000010247479706500020000000000');
-$canonicalExtJson = '{"x" : { "$type" : {"$numberInt": "2"}}}';
+$canonicalBson = hex2bin('1F000000037800170000000224747970650007000000737472696E67000000');
+$canonicalExtJson = '{"x" : { "$type" : "string"}}';
 
 // Canonical BSON -> Native -> Canonical BSON
 echo bin2hex(fromPHP(toPHP($canonicalBson))), "\n";
@@ -25,7 +25,7 @@ echo bin2hex(fromJSON($canonicalExtJson)), "\n";
 ===DONE===
 <?php exit(0); ?>
 --EXPECT--
-180000000378001000000010247479706500020000000000
-{"x":{"$type":{"$numberInt":"2"}}}
-180000000378001000000010247479706500020000000000
+1f000000037800170000000224747970650007000000737472696e67000000
+{"x":{"$type":"string"}}
+1f000000037800170000000224747970650007000000737472696e67000000
 ===DONE===
\ No newline at end of file
diff --git a/tests/bson-corpus/binary-valid-012.phpt b/tests/bson-corpus/binary-valid-012.phpt
new file mode 100644
index 000000000..a60283202
--- /dev/null
+++ b/tests/bson-corpus/binary-valid-012.phpt
@@ -0,0 +1,31 @@
+--TEST--
+Binary type: $type query operator (conflicts with legacy $binary form with $type field)
+--DESCRIPTION--
+Generated by scripts/convert-bson-corpus-tests.php
+
+DO NOT EDIT THIS FILE
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/tools.php';
+
+$canonicalBson = hex2bin('180000000378001000000010247479706500020000000000');
+$canonicalExtJson = '{"x" : { "$type" : {"$numberInt": "2"}}}';
+
+// Canonical BSON -> Native -> Canonical BSON
+echo bin2hex(fromPHP(toPHP($canonicalBson))), "\n";
+
+// Canonical BSON -> Canonical extJSON
+echo json_canonicalize(toCanonicalExtendedJSON($canonicalBson)), "\n";
+
+// Canonical extJSON -> Canonical BSON
+echo bin2hex(fromJSON($canonicalExtJson)), "\n";
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECT--
+180000000378001000000010247479706500020000000000
+{"x":{"$type":{"$numberInt":"2"}}}
+180000000378001000000010247479706500020000000000
+===DONE===
\ No newline at end of file