diff --git a/tests/Unit/Parsing/OutputExceptionTest.php b/tests/Unit/Parsing/OutputExceptionTest.php
new file mode 100644
index 00000000..d3409aa4
--- /dev/null
+++ b/tests/Unit/Parsing/OutputExceptionTest.php
@@ -0,0 +1,76 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabberworm\CSS\Tests\Unit\Parsing;
+
+use PHPUnit\Framework\TestCase;
+use Sabberworm\CSS\Parsing\OutputException;
+use Sabberworm\CSS\Parsing\SourceException;
+
+/**
+ * @covers \Sabberworm\CSS\Parsing\OutputException
+ */
+final class OutputExceptionTest extends TestCase
+{
+    /**
+     * @test
+     */
+    public function extendsSourceException(): void
+    {
+        self::assertInstanceOf(SourceException::class, new OutputException('foo'));
+    }
+
+    /**
+     * @test
+     */
+    public function getMessageReturnsMessageProvidedToConstructor(): void
+    {
+        $message = 'The cake is a lie.';
+        $exception = new OutputException($message);
+
+        self::assertStringContainsString($message, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function getLineNoByDefaultReturnsZero(): void
+    {
+        $exception = new OutputException('foo');
+
+        self::assertSame(0, $exception->getLineNo());
+    }
+
+    /**
+     * @test
+     */
+    public function getLineNoReturnsLineNumberProvidedToConstructor(): void
+    {
+        $lineNumber = 17;
+        $exception = new OutputException('foo', $lineNumber);
+
+        self::assertSame($lineNumber, $exception->getLineNo());
+    }
+
+    /**
+     * @test
+     */
+    public function getMessageWithLineNumberProvidedIncludesLineNumber(): void
+    {
+        $lineNumber = 17;
+        $exception = new OutputException('foo', $lineNumber);
+
+        self::assertStringContainsString(' [line no: ' . $lineNumber . ']', $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function canBeThrown(): void
+    {
+        $this->expectException(OutputException::class);
+
+        throw new OutputException('foo');
+    }
+}
diff --git a/tests/Unit/Parsing/SourceExceptionTest.php b/tests/Unit/Parsing/SourceExceptionTest.php
new file mode 100644
index 00000000..b497ff52
--- /dev/null
+++ b/tests/Unit/Parsing/SourceExceptionTest.php
@@ -0,0 +1,67 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabberworm\CSS\Tests\Unit\Parsing;
+
+use PHPUnit\Framework\TestCase;
+use Sabberworm\CSS\Parsing\SourceException;
+
+/**
+ * @covers \Sabberworm\CSS\Parsing\SourceException
+ */
+final class SourceExceptionTest extends TestCase
+{
+    /**
+     * @test
+     */
+    public function getMessageReturnsMessageProvidedToConstructor(): void
+    {
+        $message = 'The cake is a lie.';
+        $exception = new SourceException($message);
+
+        self::assertStringContainsString($message, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function getLineNoByDefaultReturnsZero(): void
+    {
+        $exception = new SourceException('foo');
+
+        self::assertSame(0, $exception->getLineNo());
+    }
+
+    /**
+     * @test
+     */
+    public function getLineNoReturnsLineNumberProvidedToConstructor(): void
+    {
+        $lineNumber = 17;
+        $exception = new SourceException('foo', $lineNumber);
+
+        self::assertSame($lineNumber, $exception->getLineNo());
+    }
+
+    /**
+     * @test
+     */
+    public function getMessageWithLineNumberProvidedIncludesLineNumber(): void
+    {
+        $lineNumber = 17;
+        $exception = new SourceException('foo', $lineNumber);
+
+        self::assertStringContainsString(' [line no: ' . $lineNumber . ']', $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function canBeThrown(): void
+    {
+        $this->expectException(SourceException::class);
+
+        throw new SourceException('foo');
+    }
+}
diff --git a/tests/Unit/Parsing/UnexpectedEOFExceptionTest.php b/tests/Unit/Parsing/UnexpectedEOFExceptionTest.php
new file mode 100644
index 00000000..929609ef
--- /dev/null
+++ b/tests/Unit/Parsing/UnexpectedEOFExceptionTest.php
@@ -0,0 +1,177 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabberworm\CSS\Tests\Unit\Parsing;
+
+use PHPUnit\Framework\TestCase;
+use Sabberworm\CSS\Parsing\UnexpectedEOFException;
+use Sabberworm\CSS\Parsing\UnexpectedTokenException;
+
+/**
+ * @covers \Sabberworm\CSS\Parsing\UnexpectedEOFException
+ */
+final class UnexpectedEOFExceptionTest extends TestCase
+{
+    /**
+     * @test
+     */
+    public function extendsUnexpectedTokenException(): void
+    {
+        self::assertInstanceOf(UnexpectedTokenException::class, new UnexpectedEOFException('expected', 'found'));
+    }
+
+    /**
+     * @test
+     */
+    public function getLineNoByDefaultReturnsZero(): void
+    {
+        $exception = new UnexpectedEOFException('expected', 'found');
+
+        self::assertSame(0, $exception->getLineNo());
+    }
+
+    /**
+     * @test
+     */
+    public function getLineNoReturnsLineNumberProvidedToConstructor(): void
+    {
+        $lineNumber = 17;
+        $exception = new UnexpectedEOFException('expected', 'found', 'literal', $lineNumber);
+
+        self::assertSame($lineNumber, $exception->getLineNo());
+    }
+
+    /**
+     * @test
+     */
+    public function getMessageWithLineNumberProvidedIncludesLineNumber(): void
+    {
+        $lineNumber = 17;
+        $exception = new UnexpectedEOFException('expected', 'found', 'literal', $lineNumber);
+
+        self::assertStringContainsString(' [line no: ' . $lineNumber . ']', $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function canBeThrown(): void
+    {
+        $this->expectException(UnexpectedEOFException::class);
+
+        throw new UnexpectedEOFException('expected', 'found');
+    }
+
+    /**
+     * @test
+     */
+    public function messageByDefaultRefersToTokenNotFound(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedEOFException($expected, $found);
+
+        $expectedMessage = 'Token “' . $expected . '” (literal) not found. Got “' . $found . '”.';
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function messageForInvalidMatchTypeRefersToTokenNotFound(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedEOFException($expected, $found, 'coding');
+
+        $expectedMessage = 'Token “' . $expected . '” (coding) not found. Got “' . $found . '”.';
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function messageForLiteralMatchTypeRefersToTokenNotFound(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedEOFException($expected, $found, 'literal');
+
+        $expectedMessage = 'Token “' . $expected . '” (literal) not found. Got “' . $found . '”.';
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function messageForSearchMatchTypeRefersToNoResults(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedEOFException($expected, $found, 'search');
+
+        $expectedMessage = 'Search for “' . $expected . '” returned no results. Context: “' . $found . '”.';
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function messageForCountMatchTypeRefersToNumberOfCharacters(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedEOFException($expected, $found, 'count');
+
+        $expectedMessage = 'Next token was expected to have ' . $expected . ' chars. Context: “' . $found . '”.';
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function messageForIdentifierMatchTypeRefersToIdentifier(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedEOFException($expected, $found, 'identifier');
+
+        $expectedMessage = 'Identifier expected. Got “' . $found . '”';
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function messageForCustomMatchTypeMentionsExpectedAndFound(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedEOFException($expected, $found, 'custom');
+
+        $expectedMessage = $expected . ' ' . $found;
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function messageForCustomMatchTypeTrimsMessage(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedEOFException(' ' . $expected, $found . ' ', 'custom');
+
+        $expectedMessage = $expected . ' ' . $found;
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+}
diff --git a/tests/Unit/Parsing/UnexpectedTokenExceptionTest.php b/tests/Unit/Parsing/UnexpectedTokenExceptionTest.php
new file mode 100644
index 00000000..e5c7a64d
--- /dev/null
+++ b/tests/Unit/Parsing/UnexpectedTokenExceptionTest.php
@@ -0,0 +1,177 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabberworm\CSS\Tests\Unit\Parsing;
+
+use PHPUnit\Framework\TestCase;
+use Sabberworm\CSS\Parsing\SourceException;
+use Sabberworm\CSS\Parsing\UnexpectedTokenException;
+
+/**
+ * @covers \Sabberworm\CSS\Parsing\UnexpectedTokenException
+ */
+final class UnexpectedTokenExceptionTest extends TestCase
+{
+    /**
+     * @test
+     */
+    public function extendsSourceException(): void
+    {
+        self::assertInstanceOf(SourceException::class, new UnexpectedTokenException('expected', 'found'));
+    }
+
+    /**
+     * @test
+     */
+    public function getLineNoByDefaultReturnsZero(): void
+    {
+        $exception = new UnexpectedTokenException('expected', 'found');
+
+        self::assertSame(0, $exception->getLineNo());
+    }
+
+    /**
+     * @test
+     */
+    public function getLineNoReturnsLineNumberProvidedToConstructor(): void
+    {
+        $lineNumber = 17;
+        $exception = new UnexpectedTokenException('expected', 'found', 'literal', $lineNumber);
+
+        self::assertSame($lineNumber, $exception->getLineNo());
+    }
+
+    /**
+     * @test
+     */
+    public function getMessageWithLineNumberProvidedIncludesLineNumber(): void
+    {
+        $lineNumber = 17;
+        $exception = new UnexpectedTokenException('expected', 'found', 'literal', $lineNumber);
+
+        self::assertStringContainsString(' [line no: ' . $lineNumber . ']', $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function canBeThrown(): void
+    {
+        $this->expectException(UnexpectedTokenException::class);
+
+        throw new UnexpectedTokenException('expected', 'found');
+    }
+
+    /**
+     * @test
+     */
+    public function messageByDefaultRefersToTokenNotFound(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedTokenException($expected, $found);
+
+        $expectedMessage = 'Token “' . $expected . '” (literal) not found. Got “' . $found . '”.';
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function messageForInvalidMatchTypeRefersToTokenNotFound(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedTokenException($expected, $found, 'coding');
+
+        $expectedMessage = 'Token “' . $expected . '” (coding) not found. Got “' . $found . '”.';
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function messageForLiteralMatchTypeRefersToTokenNotFound(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedTokenException($expected, $found, 'literal');
+
+        $expectedMessage = 'Token “' . $expected . '” (literal) not found. Got “' . $found . '”.';
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function messageForSearchMatchTypeRefersToNoResults(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedTokenException($expected, $found, 'search');
+
+        $expectedMessage = 'Search for “' . $expected . '” returned no results. Context: “' . $found . '”.';
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function messageForCountMatchTypeRefersToNumberOfCharacters(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedTokenException($expected, $found, 'count');
+
+        $expectedMessage = 'Next token was expected to have ' . $expected . ' chars. Context: “' . $found . '”.';
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function messageForIdentifierMatchTypeRefersToIdentifier(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedTokenException($expected, $found, 'identifier');
+
+        $expectedMessage = 'Identifier expected. Got “' . $found . '”';
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function messageForCustomMatchTypeMentionsExpectedAndFound(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedTokenException($expected, $found, 'custom');
+
+        $expectedMessage = $expected . ' ' . $found;
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+
+    /**
+     * @test
+     */
+    public function messageForCustomMatchTypeTrimsMessage(): void
+    {
+        $expected = 'tea';
+        $found = 'coffee';
+
+        $exception = new UnexpectedTokenException(' ' . $expected, $found . ' ', 'custom');
+
+        $expectedMessage = $expected . ' ' . $found;
+        self::assertStringContainsString($expectedMessage, $exception->getMessage());
+    }
+}