diff --git a/src/ComposerRequireChecker/JsonLoader.php b/src/ComposerRequireChecker/JsonLoader.php
index 9770491a..19a4a23b 100644
--- a/src/ComposerRequireChecker/JsonLoader.php
+++ b/src/ComposerRequireChecker/JsonLoader.php
@@ -53,7 +53,7 @@ private static function getFileContentFromPath(string $path): string
             Assert::file($path);
             Assert::readable($path);
         } catch (InvalidArgumentException $exception) {
-            throw new NotReadable('unable to read ' . $path, 0, $exception);
+            throw new NotReadable('unable to read file: ' . $exception->getMessage(), 0, $exception);
         }
 
         $content = file_get_contents($path);
diff --git a/test/ComposerRequireCheckerTest/JsonLoaderTest.php b/test/ComposerRequireCheckerTest/JsonLoaderTest.php
index 0e8b3ce1..05d4b6c1 100644
--- a/test/ComposerRequireCheckerTest/JsonLoaderTest.php
+++ b/test/ComposerRequireCheckerTest/JsonLoaderTest.php
@@ -9,6 +9,8 @@
 use ComposerRequireChecker\JsonLoader;
 use PHPUnit\Framework\TestCase;
 
+use function file_exists;
+
 /** @covers \ComposerRequireChecker\JsonLoader */
 final class JsonLoaderTest extends TestCase
 {
@@ -16,6 +18,8 @@ public function testHasErrorWithWrongPath(): void
     {
         $path = __DIR__ . '/wrong/path/non-existing-file.json';
         $this->expectException(NotReadable::class);
+        $this->expectExceptionMessage('unable to read file: The file "' . $path . '" does not exist.');
+        $this->expectExceptionCode(0);
         JsonLoader::getData($path);
     }
 
@@ -23,6 +27,30 @@ public function testHasErrorWithInvalidFile(): void
     {
         $path = __DIR__ . '/../fixtures/invalidJson';
         $this->expectException(InvalidJson::class);
+        $this->expectExceptionMessage('error parsing ' . $path . ': Syntax error');
+        $this->expectExceptionCode(0);
+        JsonLoader::getData($path);
+    }
+
+    public function testHasErrorWithUnreadableFile(): void
+    {
+        $path = '/etc/shadow';
+        if (! file_exists($path)) {
+            $this->markTestSkipped('This system does not have ' . $path);
+        }
+
+        $this->expectException(NotReadable::class);
+        $this->expectExceptionMessage('unable to read file: The path "' . $path . '" is not readable.');
+        $this->expectExceptionCode(0);
+        JsonLoader::getData($path);
+    }
+
+    public function testHasErrorWithDirectory(): void
+    {
+        $path = __DIR__;
+        $this->expectException(NotReadable::class);
+        $this->expectExceptionMessage('unable to read file: The path "' . $path . '" is not a file.');
+        $this->expectExceptionCode(0);
         JsonLoader::getData($path);
     }
 
@@ -30,9 +58,27 @@ public function testHasDataWithValidFileButNoArrayContent(): void
     {
         $path = __DIR__ . '/../fixtures/validJsonNotAnArray.json';
         $this->expectException(InvalidJson::class);
+        $this->expectExceptionMessage('error parsing ' . $path . ': Expected an array.');
+        $this->expectExceptionCode(0);
+        JsonLoader::getData($path);
+    }
+
+    public function testHasDataWithValidFileButExcessiveDepth(): void
+    {
+        $path = __DIR__ . '/../fixtures/validJsonExcessiveDepth.json';
+        $this->expectException(InvalidJson::class);
+        $this->expectExceptionMessage('error parsing ' . $path . ': Maximum stack depth exceeded');
+        $this->expectExceptionCode(0);
         JsonLoader::getData($path);
     }
 
+    public function testHasDataWithValidFileWithVeryLargeDepth(): void
+    {
+        $path = __DIR__ . '/../fixtures/validJsonVeryLargeDepth.json';
+        $data = JsonLoader::getData($path);
+        $this->assertEquals('bar', $data['foo'] ?? null);
+    }
+
     public function testHasDataWithValidFile(): void
     {
         $path = __DIR__ . '/../fixtures/validJson.json';
diff --git a/test/fixtures/validJsonExcessiveDepth.json b/test/fixtures/validJsonExcessiveDepth.json
new file mode 100644
index 00000000..cf74666d
--- /dev/null
+++ b/test/fixtures/validJsonExcessiveDepth.json
@@ -0,0 +1,6 @@
+{
+  "foo": "bar",
+  "baz": [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
+    "This string is at a depth of 513, which is larger than the allowed maximum of 512. 512 is the built-in default."
+  ]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]
+}
diff --git a/test/fixtures/validJsonVeryLargeDepth.json b/test/fixtures/validJsonVeryLargeDepth.json
new file mode 100644
index 00000000..e7d82555
--- /dev/null
+++ b/test/fixtures/validJsonVeryLargeDepth.json
@@ -0,0 +1,6 @@
+{
+  "foo": "bar",
+  "baz": [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
+    "This string is at a depth of 512, which is the largest allowed depth. 512 is the built-in default."
+  ]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]
+}