diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php
index 2e00fc226231..c18d27868819 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php
@@ -186,11 +186,6 @@ private function writeData(array $data, array $options)
     {
         $flags = isset($options['json_encoding']) ? $options['json_encoding'] : 0;
 
-        if (\PHP_VERSION_ID >= 70300 && (JSON_THROW_ON_ERROR & $flags)) {
-            // Work around https://bugs.php.net/77997
-            json_encode(null);
-        }
-
         $this->write(json_encode($data, $flags | JSON_PRETTY_PRINT)."\n");
     }
 
diff --git a/src/Symfony/Component/Console/Descriptor/JsonDescriptor.php b/src/Symfony/Component/Console/Descriptor/JsonDescriptor.php
index 529fb82c4029..f5a143800b27 100644
--- a/src/Symfony/Component/Console/Descriptor/JsonDescriptor.php
+++ b/src/Symfony/Component/Console/Descriptor/JsonDescriptor.php
@@ -99,11 +99,6 @@ private function writeData(array $data, array $options)
     {
         $flags = isset($options['json_encoding']) ? $options['json_encoding'] : 0;
 
-        if (\PHP_VERSION_ID >= 70300 && (JSON_THROW_ON_ERROR & $flags)) {
-            // Work around https://bugs.php.net/77997
-            json_encode(null);
-        }
-
         $this->write(json_encode($data, $flags));
     }
 
diff --git a/src/Symfony/Component/Form/Console/Descriptor/JsonDescriptor.php b/src/Symfony/Component/Form/Console/Descriptor/JsonDescriptor.php
index 00a5425866b2..428586965ba6 100644
--- a/src/Symfony/Component/Form/Console/Descriptor/JsonDescriptor.php
+++ b/src/Symfony/Component/Form/Console/Descriptor/JsonDescriptor.php
@@ -83,11 +83,6 @@ private function writeData(array $data, array $options)
     {
         $flags = isset($options['json_encoding']) ? $options['json_encoding'] : 0;
 
-        if (\PHP_VERSION_ID >= 70300 && (JSON_THROW_ON_ERROR & $flags)) {
-            // Work around https://bugs.php.net/77997
-            json_encode(null);
-        }
-
         $this->output->write(json_encode($data, $flags | JSON_PRETTY_PRINT)."\n");
     }
 
diff --git a/src/Symfony/Component/HttpFoundation/JsonResponse.php b/src/Symfony/Component/HttpFoundation/JsonResponse.php
index 52f55f7486c9..24798eea42b3 100644
--- a/src/Symfony/Component/HttpFoundation/JsonResponse.php
+++ b/src/Symfony/Component/HttpFoundation/JsonResponse.php
@@ -153,11 +153,6 @@ public function setData($data = [])
                     restore_error_handler();
                 }
             } else {
-                if (\PHP_VERSION_ID >= 70300 && (JSON_THROW_ON_ERROR & $this->encodingOptions)) {
-                    // Work around https://bugs.php.net/77997
-                    json_encode(null);
-                }
-
                 try {
                     $data = json_encode($data, $this->encodingOptions);
                 } catch (\Exception $e) {
@@ -166,6 +161,10 @@ public function setData($data = [])
                     }
                     throw $e;
                 }
+
+                if (\PHP_VERSION_ID >= 70300 && (JSON_THROW_ON_ERROR & $this->encodingOptions)) {
+                    return $this->setJson($data);
+                }
             }
         }
 
diff --git a/src/Symfony/Component/Serializer/Encoder/JsonDecode.php b/src/Symfony/Component/Serializer/Encoder/JsonDecode.php
index 1d0b86afc5d0..a55f1232e7e9 100644
--- a/src/Symfony/Component/Serializer/Encoder/JsonDecode.php
+++ b/src/Symfony/Component/Serializer/Encoder/JsonDecode.php
@@ -72,7 +72,15 @@ public function decode($data, $format, array $context = [])
         $recursionDepth = $context['json_decode_recursion_depth'];
         $options = $context['json_decode_options'];
 
-        $decodedData = json_decode($data, $associative, $recursionDepth, $options);
+        try {
+            $decodedData = json_decode($data, $associative, $recursionDepth, $options);
+        } catch (\JsonException $e) {
+            throw new NotEncodableValueException($e->getMessage(), 0, $e);
+        }
+
+        if (\PHP_VERSION_ID >= 70300 && (JSON_THROW_ON_ERROR & $options)) {
+            return $decodedData;
+        }
 
         if (JSON_ERROR_NONE !== json_last_error()) {
             throw new NotEncodableValueException(json_last_error_msg());
diff --git a/src/Symfony/Component/Serializer/Encoder/JsonEncode.php b/src/Symfony/Component/Serializer/Encoder/JsonEncode.php
index e5b48757dd0c..76e532c4b7a3 100644
--- a/src/Symfony/Component/Serializer/Encoder/JsonEncode.php
+++ b/src/Symfony/Component/Serializer/Encoder/JsonEncode.php
@@ -36,13 +36,12 @@ public function encode($data, $format, array $context = [])
     {
         $context = $this->resolveContext($context);
 
+        $encodedJson = json_encode($data, $context['json_encode_options']);
+
         if (\PHP_VERSION_ID >= 70300 && (JSON_THROW_ON_ERROR & $context['json_encode_options'])) {
-            // Work around https://bugs.php.net/77997
-            json_encode(null);
+            return $encodedJson;
         }
 
-        $encodedJson = json_encode($data, $context['json_encode_options']);
-
         if (JSON_ERROR_NONE !== json_last_error() && (false === $encodedJson || !($context['json_encode_options'] & JSON_PARTIAL_OUTPUT_ON_ERROR))) {
             throw new NotEncodableValueException(json_last_error_msg());
         }
diff --git a/src/Symfony/Component/Translation/Dumper/JsonFileDumper.php b/src/Symfony/Component/Translation/Dumper/JsonFileDumper.php
index 2a8d23d477e2..3ee446dc7318 100644
--- a/src/Symfony/Component/Translation/Dumper/JsonFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/JsonFileDumper.php
@@ -31,11 +31,6 @@ public function formatCatalogue(MessageCatalogue $messages, $domain, array $opti
             $flags = \defined('JSON_PRETTY_PRINT') ? JSON_PRETTY_PRINT : 0;
         }
 
-        if (\PHP_VERSION_ID >= 70300 && (JSON_THROW_ON_ERROR & $flags)) {
-            // Work around https://bugs.php.net/77997
-            json_encode(null);
-        }
-
         return json_encode($messages->all($domain), $flags);
     }