diff --git a/Universal/Docs/WhiteSpace/FirstClassCallableSpacingStandard.xml b/Universal/Docs/WhiteSpace/FirstClassCallableSpacingStandard.xml
new file mode 100644
index 0000000..e7714b1
--- /dev/null
+++ b/Universal/Docs/WhiteSpace/FirstClassCallableSpacingStandard.xml
@@ -0,0 +1,33 @@
+<?xml version="1.0"?>
+<documentation xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="https://phpcsstandards.github.io/PHPCSDevTools/phpcsdocs.xsd"
+    title="First Class Callable Spacing"
+    >
+    <standard>
+    <![CDATA[
+    There should be no space around the ellipsis when used in a first class callable.
+    ]]>
+    </standard>
+    <code_comparison>
+        <code title="Valid: No space around the ellipsis in a first class callable.">
+        <![CDATA[
+$callback = foo(<em>...</em>);
+array_map(
+    $this->method(<em>...</em>),
+    $array
+);
+        ]]>
+        </code>
+        <code title="Invalid: Space found around the ellipsis in a first class callable.">
+        <![CDATA[
+$callback = foo(<em> </em>...<em> </em>);
+array_map(
+    $this->method(<em>
+        </em>...<em>
+    </em>),
+    $array
+);
+        ]]>
+        </code>
+    </code_comparison>
+</documentation>
diff --git a/Universal/Sniffs/WhiteSpace/FirstClassCallableSpacingSniff.php b/Universal/Sniffs/WhiteSpace/FirstClassCallableSpacingSniff.php
new file mode 100644
index 0000000..07f5df6
--- /dev/null
+++ b/Universal/Sniffs/WhiteSpace/FirstClassCallableSpacingSniff.php
@@ -0,0 +1,101 @@
+<?php
+/**
+ * PHPCSExtra, a collection of sniffs and standards for use with PHP_CodeSniffer.
+ *
+ * @package   PHPCSExtra
+ * @copyright 2020 PHPCSExtra Contributors
+ * @license   https://opensource.org/licenses/LGPL-3.0 LGPL3
+ * @link      https://github.com/PHPCSStandards/PHPCSExtra
+ */
+
+namespace PHPCSExtra\Universal\Sniffs\WhiteSpace;
+
+use PHP_CodeSniffer\Files\File;
+use PHP_CodeSniffer\Sniffs\Sniff;
+use PHP_CodeSniffer\Util\Tokens;
+use PHPCSUtils\Fixers\SpacesFixer;
+
+/**
+ * Checks the spacing around the ellipses for first class callables.
+ *
+ * @since 1.5.0
+ */
+final class FirstClassCallableSpacingSniff implements Sniff
+{
+
+    /**
+     * The number of spaces to demand before and after the ellipsis for a first class callable.
+     *
+     * @since 1.5.0
+     *
+     * @var int
+     */
+    public $spacing = 0;
+
+    /**
+     * Returns an array of tokens this test wants to listen for.
+     *
+     * @since 1.5.0
+     *
+     * @return array<int|string>
+     */
+    public function register()
+    {
+        return [\T_ELLIPSIS];
+    }
+
+    /**
+     * Processes this test, when one of its tokens is encountered.
+     *
+     * @since 1.5.0
+     *
+     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file being scanned.
+     * @param int                         $stackPtr  The position of the current token
+     *                                               in the stack passed in $tokens.
+     *
+     * @return void
+     */
+    public function process(File $phpcsFile, $stackPtr)
+    {
+        $tokens = $phpcsFile->getTokens();
+
+        // Verify this is an ellipsis for a first class callable.
+        $previousNonEmpty = $phpcsFile->findPrevious(Tokens::$emptyTokens, ($stackPtr - 1), null, true);
+        if ($tokens[$previousNonEmpty]['code'] !== \T_OPEN_PARENTHESIS) {
+            return;
+        }
+
+        $nextNonEmpty = $phpcsFile->findNext(Tokens::$emptyTokens, ($stackPtr + 1), null, true);
+        if ($nextNonEmpty === false || $tokens[$nextNonEmpty]['code'] !== \T_CLOSE_PARENTHESIS) {
+            return;
+        }
+
+        $spacing = (int) $this->spacing;
+
+        // Check spacing before the ellipsis.
+        SpacesFixer::checkAndFix(
+            $phpcsFile,
+            $previousNonEmpty,
+            $stackPtr,
+            $spacing,
+            'Incorrect spacing between first class callable open parentheses and ellipsis. Expected: %s, found: %s.',
+            'SpacingBefore',
+            'error',
+            0,
+            'First class callables: space before ellipsis'
+        );
+
+        // Check spacing after the ellipsis.
+        SpacesFixer::checkAndFix(
+            $phpcsFile,
+            $stackPtr,
+            $nextNonEmpty,
+            $spacing,
+            'Incorrect spacing between first class callable ellipsis and close parentheses. Expected: %s, found: %s.',
+            'SpacingAfter',
+            'error',
+            0,
+            'First class callables: space after ellipsis'
+        );
+    }
+}
diff --git a/Universal/Tests/WhiteSpace/FirstClassCallableSpacingUnitTest.1.inc b/Universal/Tests/WhiteSpace/FirstClassCallableSpacingUnitTest.1.inc
new file mode 100644
index 0000000..f3f7fe5
--- /dev/null
+++ b/Universal/Tests/WhiteSpace/FirstClassCallableSpacingUnitTest.1.inc
@@ -0,0 +1,49 @@
+<?php
+
+// Not our target...
+function foo(...$args) {}
+callMe($foo, ...$args);
+$array = [$a, ...$b, $c];
+
+// First class callables.
+callMe(...); // OK.
+callMe( ...);
+callMe(... );
+callMe( ... );
+callMe(  ...  );
+callMe(
+
+    ...
+
+);
+callMe( /*comment*/ ... );
+
+// phpcs:set Universal.WhiteSpace.FirstClassCallableSpacing spacing 1
+callMe( ... ); // OK.
+callMe(... );
+callMe( ...);
+callMe(...);
+callMe(  ...  );
+callMe(
+
+
+    ...
+);
+callMe(... /*comment*/ );
+
+// phpcs:set Universal.WhiteSpace.FirstClassCallableSpacing spacing 2
+callMe(  ...  ); // OK.
+callMe(...  );
+callMe(  ...);
+callMe(...);
+callMe( ... );
+callMe(   ...   );
+callMe(
+    ...
+
+
+);
+callMe(... /*comment*/ );
+
+// Reset the property to its default value.
+// phpcs:set Universal.WhiteSpace.FirstClassCallableSpacing spacing 0
diff --git a/Universal/Tests/WhiteSpace/FirstClassCallableSpacingUnitTest.1.inc.fixed b/Universal/Tests/WhiteSpace/FirstClassCallableSpacingUnitTest.1.inc.fixed
new file mode 100644
index 0000000..6b53ebf
--- /dev/null
+++ b/Universal/Tests/WhiteSpace/FirstClassCallableSpacingUnitTest.1.inc.fixed
@@ -0,0 +1,37 @@
+<?php
+
+// Not our target...
+function foo(...$args) {}
+callMe($foo, ...$args);
+$array = [$a, ...$b, $c];
+
+// First class callables.
+callMe(...); // OK.
+callMe(...);
+callMe(...);
+callMe(...);
+callMe(...);
+callMe(...);
+callMe( /*comment*/ ...);
+
+// phpcs:set Universal.WhiteSpace.FirstClassCallableSpacing spacing 1
+callMe( ... ); // OK.
+callMe( ... );
+callMe( ... );
+callMe( ... );
+callMe( ... );
+callMe( ... );
+callMe( ... /*comment*/ );
+
+// phpcs:set Universal.WhiteSpace.FirstClassCallableSpacing spacing 2
+callMe(  ...  ); // OK.
+callMe(  ...  );
+callMe(  ...  );
+callMe(  ...  );
+callMe(  ...  );
+callMe(  ...  );
+callMe(  ...  );
+callMe(  ... /*comment*/ );
+
+// Reset the property to its default value.
+// phpcs:set Universal.WhiteSpace.FirstClassCallableSpacing spacing 0
diff --git a/Universal/Tests/WhiteSpace/FirstClassCallableSpacingUnitTest.2.inc b/Universal/Tests/WhiteSpace/FirstClassCallableSpacingUnitTest.2.inc
new file mode 100644
index 0000000..74c60c6
--- /dev/null
+++ b/Universal/Tests/WhiteSpace/FirstClassCallableSpacingUnitTest.2.inc
@@ -0,0 +1,6 @@
+<?php
+
+// Intentional parse error.
+// This must be the only test in the file.
+// This code sniff should **not** be flagged as we cannot determine for certain whether this is a first class callable or not.
+callable(  ...
diff --git a/Universal/Tests/WhiteSpace/FirstClassCallableSpacingUnitTest.php b/Universal/Tests/WhiteSpace/FirstClassCallableSpacingUnitTest.php
new file mode 100644
index 0000000..4a13c6e
--- /dev/null
+++ b/Universal/Tests/WhiteSpace/FirstClassCallableSpacingUnitTest.php
@@ -0,0 +1,77 @@
+<?php
+/**
+ * PHPCSExtra, a collection of sniffs and standards for use with PHP_CodeSniffer.
+ *
+ * @package   PHPCSExtra
+ * @copyright 2020 PHPCSExtra Contributors
+ * @license   https://opensource.org/licenses/LGPL-3.0 LGPL3
+ * @link      https://github.com/PHPCSStandards/PHPCSExtra
+ */
+
+namespace PHPCSExtra\Universal\Tests\WhiteSpace;
+
+use PHP_CodeSniffer\Tests\Standards\AbstractSniffTestCase;
+
+/**
+ * Unit test class for the FirstClassCallableSpacing sniff.
+ *
+ * @covers PHPCSExtra\Universal\Sniffs\WhiteSpace\FirstClassCallableSpacingSniff
+ *
+ * @since 1.5.0
+ */
+final class FirstClassCallableSpacingUnitTest extends AbstractSniffTestCase
+{
+
+    /**
+     * Returns the lines where errors should occur.
+     *
+     * @param string $testFile The name of the file being tested.
+     *
+     * @return array<int, int> Key is the line number, value is the number of expected errors.
+     */
+    public function getErrorList($testFile = '')
+    {
+        switch ($testFile) {
+            case 'FirstClassCallableSpacingUnitTest.1.inc':
+                return [
+                    10 => 1,
+                    11 => 1,
+                    12 => 2,
+                    13 => 2,
+                    14 => 1,
+                    16 => 1,
+                    19 => 2,
+
+                    23 => 1,
+                    24 => 1,
+                    25 => 2,
+                    26 => 2,
+                    27 => 1,
+                    30 => 1,
+                    32 => 1,
+
+                    36 => 1,
+                    37 => 1,
+                    38 => 2,
+                    39 => 2,
+                    40 => 2,
+                    41 => 1,
+                    42 => 1,
+                    46 => 2,
+                ];
+
+            default:
+                return [];
+        }
+    }
+
+    /**
+     * Returns the lines where warnings should occur.
+     *
+     * @return array<int, int> Key is the line number, value is the number of expected warnings.
+     */
+    public function getWarningList()
+    {
+        return [];
+    }
+}