diff --git a/core/src/test/java/io/smallrye/openapi/runtime/io/OpenApiParserAndSerializerTest.java b/core/src/test/java/io/smallrye/openapi/runtime/io/OpenApiParserAndSerializerTest.java
index b602fc3bc..70c329f06 100644
--- a/core/src/test/java/io/smallrye/openapi/runtime/io/OpenApiParserAndSerializerTest.java
+++ b/core/src/test/java/io/smallrye/openapi/runtime/io/OpenApiParserAndSerializerTest.java
@@ -1,10 +1,10 @@
 package io.smallrye.openapi.runtime.io;
 
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.StringReader;
+import java.io.*;
 import java.net.URL;
-import java.text.ParseException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
 
 import org.apache.commons.io.IOUtils;
 import org.eclipse.microprofile.openapi.models.OpenAPI;
@@ -13,11 +13,17 @@
 import org.junit.jupiter.api.Test;
 import org.skyscreamer.jsonassert.JSONAssert;
 
+import com.fasterxml.jackson.dataformat.yaml.JacksonYAMLParseException;
+
+import io.smallrye.openapi.api.constants.OpenApiConstants;
+
 /**
  * @author eric.wittmann@gmail.com
  */
 class OpenApiParserAndSerializerTest {
 
+    static final int REPEAT_BODY_CONTENTS_ITERATIONS = 1536; // ~8MB?
+
     /**
      * Loads a resource as a string (reads the content at the URL).
      * 
@@ -69,19 +75,33 @@ private static String normalizeYaml(String yaml) {
         }
     }
 
+    private static Path generateBigStaticFile() throws IOException {
+        //  let's build a big openapi file, start by its header
+        String bigFileContents = loadResource(OpenApiParserAndSerializerTest.class.getResource("openapi-fragment-header.yaml"));
+        // body
+        final String bodyChunk = loadResource(OpenApiParserAndSerializerTest.class.getResource("openapi-fragment-body.yaml"));
+        for (int i = 0; i < REPEAT_BODY_CONTENTS_ITERATIONS; i++) {
+            //  n-chunk of body
+            bigFileContents += bodyChunk.replaceAll("@@ID@@", String.valueOf(i));
+        }
+        //  footer
+        bigFileContents += loadResource(OpenApiParserAndSerializerTest.class.getResource("openapi-fragment-footer.yaml"));
+
+        Path tempFile = Files.createTempFile("sroap-big-file-test-", "-generated.yaml");
+        Files.write(tempFile, bigFileContents.getBytes(StandardCharsets.UTF_8));
+        return tempFile;
+    }
+
     /**
      * Performs a full round-trip parse+serialize test on a single resource.
-     * 
-     * @param resource
+     *
+     * @param testResource
      * @param format
      * @throws IOException
-     * @throws ParseException
      * @throws JSONException
      */
-    private static void doTest(String resource, Format format) throws IOException, ParseException, JSONException {
-        URL testResource = OpenApiParserAndSerializerTest.class.getResource(resource);
+    private static void doTest(URL testResource, Format format, OpenAPI impl) throws IOException, JSONException {
         String original = loadResource(testResource);
-        OpenAPI impl = OpenApiParser.parse(testResource);
         String roundTrip = OpenApiSerializer.serialize(impl, format);
 
         try {
@@ -98,11 +118,38 @@ private static void doTest(String resource, Format format) throws IOException, P
         }
     }
 
+    /**
+     * Performs a full round-trip parse+serialize test on a single resource.
+     * 
+     * @param resource
+     * @param format
+     * @throws IOException
+     * @throws JSONException
+     */
+    private static void doTest(String resource, Format format) throws IOException, JSONException {
+        URL testResource = OpenApiParserAndSerializerTest.class.getResource(resource);
+        OpenAPI impl = OpenApiParser.parse(testResource);
+        doTest(testResource, format, impl);
+    }
+
+    /**
+     * Performs a full round-trip parse+serialize test on a single resource.
+     *
+     * @param testResource
+     * @param format
+     * @throws IOException
+     * @throws JSONException
+     */
+    private static void doTest(URL testResource, Format format) throws IOException, JSONException {
+        OpenAPI impl = OpenApiParser.parse(testResource);
+        doTest(testResource, format, impl);
+    }
+
     /**
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testParseSimplest() throws IOException, ParseException, JSONException {
+    void testParseSimplest() throws IOException, JSONException {
         doTest("simplest.json", Format.JSON);
     }
 
@@ -110,7 +157,7 @@ void testParseSimplest() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testParseSimplestYaml() throws IOException, ParseException, JSONException {
+    void testParseSimplestYaml() throws IOException, JSONException {
         doTest("simplest.yaml", Format.YAML);
     }
 
@@ -118,7 +165,7 @@ void testParseSimplestYaml() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testParseInfo() throws IOException, ParseException, JSONException {
+    void testParseInfo() throws IOException, JSONException {
         doTest("info.json", Format.JSON);
     }
 
@@ -126,7 +173,7 @@ void testParseInfo() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testParseInfoYaml() throws IOException, ParseException, JSONException {
+    void testParseInfoYaml() throws IOException, JSONException {
         doTest("info.yaml", Format.YAML);
     }
 
@@ -134,7 +181,7 @@ void testParseInfoYaml() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testExternalDocs() throws IOException, ParseException, JSONException {
+    void testExternalDocs() throws IOException, JSONException {
         doTest("externalDocs.json", Format.JSON);
     }
 
@@ -142,7 +189,7 @@ void testExternalDocs() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testExtensions() throws IOException, ParseException, JSONException {
+    void testExtensions() throws IOException, JSONException {
         doTest("extensions.json", Format.JSON);
     }
 
@@ -150,7 +197,7 @@ void testExtensions() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testSecurity() throws IOException, ParseException, JSONException {
+    void testSecurity() throws IOException, JSONException {
         doTest("security.json", Format.JSON);
     }
 
@@ -158,7 +205,7 @@ void testSecurity() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testServers() throws IOException, ParseException, JSONException {
+    void testServers() throws IOException, JSONException {
         doTest("servers.json", Format.JSON);
     }
 
@@ -166,7 +213,7 @@ void testServers() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testServersYaml() throws IOException, ParseException, JSONException {
+    void testServersYaml() throws IOException, JSONException {
         doTest("servers.yaml", Format.YAML);
     }
 
@@ -174,7 +221,7 @@ void testServersYaml() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testTags() throws IOException, ParseException, JSONException {
+    void testTags() throws IOException, JSONException {
         doTest("tags.json", Format.JSON);
     }
 
@@ -182,7 +229,7 @@ void testTags() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testComponents_Callbacks() throws IOException, ParseException, JSONException {
+    void testComponents_Callbacks() throws IOException, JSONException {
         doTest("components-callbacks.json", Format.JSON);
     }
 
@@ -190,7 +237,7 @@ void testComponents_Callbacks() throws IOException, ParseException, JSONExceptio
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testComponents_Empty() throws IOException, ParseException, JSONException {
+    void testComponents_Empty() throws IOException, JSONException {
         doTest("components-empty.json", Format.JSON);
     }
 
@@ -198,7 +245,7 @@ void testComponents_Empty() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testComponents_Examples() throws IOException, ParseException, JSONException {
+    void testComponents_Examples() throws IOException, JSONException {
         doTest("components-examples.json", Format.JSON);
     }
 
@@ -206,7 +253,7 @@ void testComponents_Examples() throws IOException, ParseException, JSONException
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testComponents_Headers() throws IOException, ParseException, JSONException {
+    void testComponents_Headers() throws IOException, JSONException {
         doTest("components-headers.json", Format.JSON);
     }
 
@@ -214,7 +261,7 @@ void testComponents_Headers() throws IOException, ParseException, JSONException
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testComponents_Links() throws IOException, ParseException, JSONException {
+    void testComponents_Links() throws IOException, JSONException {
         doTest("components-links.json", Format.JSON);
     }
 
@@ -222,7 +269,7 @@ void testComponents_Links() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testComponents_Parameters() throws IOException, ParseException, JSONException {
+    void testComponents_Parameters() throws IOException, JSONException {
         doTest("components-parameters.json", Format.JSON);
     }
 
@@ -230,7 +277,7 @@ void testComponents_Parameters() throws IOException, ParseException, JSONExcepti
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testComponents_RequestBodies() throws IOException, ParseException, JSONException {
+    void testComponents_RequestBodies() throws IOException, JSONException {
         doTest("components-requestBodies.json", Format.JSON);
     }
 
@@ -238,7 +285,7 @@ void testComponents_RequestBodies() throws IOException, ParseException, JSONExce
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testComponents_Responses() throws IOException, ParseException, JSONException {
+    void testComponents_Responses() throws IOException, JSONException {
         doTest("components-responses.json", Format.JSON);
     }
 
@@ -246,7 +293,7 @@ void testComponents_Responses() throws IOException, ParseException, JSONExceptio
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testComponents_Schemas() throws IOException, ParseException, JSONException {
+    void testComponents_Schemas() throws IOException, JSONException {
         doTest("components-schemas.json", Format.JSON);
     }
 
@@ -254,7 +301,7 @@ void testComponents_Schemas() throws IOException, ParseException, JSONException
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testComponents_SecuritySchemes() throws IOException, ParseException, JSONException {
+    void testComponents_SecuritySchemes() throws IOException, JSONException {
         doTest("components-securitySchemes.json", Format.JSON);
     }
 
@@ -262,7 +309,7 @@ void testComponents_SecuritySchemes() throws IOException, ParseException, JSONEx
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_AllOperations() throws IOException, ParseException, JSONException {
+    void testPaths_AllOperations() throws IOException, JSONException {
         doTest("paths-all-operations.json", Format.JSON);
     }
 
@@ -270,7 +317,7 @@ void testPaths_AllOperations() throws IOException, ParseException, JSONException
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_Empty() throws IOException, ParseException, JSONException {
+    void testPaths_Empty() throws IOException, JSONException {
         doTest("paths-empty.json", Format.JSON);
     }
 
@@ -278,7 +325,7 @@ void testPaths_Empty() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_GetCallbacks() throws IOException, ParseException, JSONException {
+    void testPaths_GetCallbacks() throws IOException, JSONException {
         doTest("paths-get-callbacks.json", Format.JSON);
     }
 
@@ -286,7 +333,7 @@ void testPaths_GetCallbacks() throws IOException, ParseException, JSONException
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_GetParameters() throws IOException, ParseException, JSONException {
+    void testPaths_GetParameters() throws IOException, JSONException {
         doTest("paths-get-parameters.json", Format.JSON);
     }
 
@@ -294,7 +341,7 @@ void testPaths_GetParameters() throws IOException, ParseException, JSONException
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_GetRequestBodyContent() throws IOException, ParseException, JSONException {
+    void testPaths_GetRequestBodyContent() throws IOException, JSONException {
         doTest("paths-get-requestBody-content.json", Format.JSON);
     }
 
@@ -302,7 +349,7 @@ void testPaths_GetRequestBodyContent() throws IOException, ParseException, JSONE
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_GetRequestBodyExample() throws IOException, ParseException, JSONException {
+    void testPaths_GetRequestBodyExample() throws IOException, JSONException {
         doTest("paths-get-requestBody-example.json", Format.JSON);
     }
 
@@ -310,7 +357,7 @@ void testPaths_GetRequestBodyExample() throws IOException, ParseException, JSONE
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_GetRequestBody() throws IOException, ParseException, JSONException {
+    void testPaths_GetRequestBody() throws IOException, JSONException {
         doTest("paths-get-requestBody.json", Format.JSON);
     }
 
@@ -318,7 +365,7 @@ void testPaths_GetRequestBody() throws IOException, ParseException, JSONExceptio
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_GetResponseContent() throws IOException, ParseException, JSONException {
+    void testPaths_GetResponseContent() throws IOException, JSONException {
         doTest("paths-get-response-content.json", Format.JSON);
     }
 
@@ -326,7 +373,7 @@ void testPaths_GetResponseContent() throws IOException, ParseException, JSONExce
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_GetResponseHeaders() throws IOException, ParseException, JSONException {
+    void testPaths_GetResponseHeaders() throws IOException, JSONException {
         doTest("paths-get-response-headers.json", Format.JSON);
     }
 
@@ -334,7 +381,7 @@ void testPaths_GetResponseHeaders() throws IOException, ParseException, JSONExce
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_GetResponseLinks() throws IOException, ParseException, JSONException {
+    void testPaths_GetResponseLinks() throws IOException, JSONException {
         doTest("paths-get-response-links.json", Format.JSON);
     }
 
@@ -342,7 +389,7 @@ void testPaths_GetResponseLinks() throws IOException, ParseException, JSONExcept
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_GetResponses() throws IOException, ParseException, JSONException {
+    void testPaths_GetResponses() throws IOException, JSONException {
         doTest("paths-get-responses.json", Format.JSON);
     }
 
@@ -350,7 +397,7 @@ void testPaths_GetResponses() throws IOException, ParseException, JSONException
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_GetSecurity() throws IOException, ParseException, JSONException {
+    void testPaths_GetSecurity() throws IOException, JSONException {
         doTest("paths-get-security.json", Format.JSON);
     }
 
@@ -358,7 +405,7 @@ void testPaths_GetSecurity() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_GetServers() throws IOException, ParseException, JSONException {
+    void testPaths_GetServers() throws IOException, JSONException {
         doTest("paths-get-servers.json", Format.JSON);
     }
 
@@ -366,7 +413,7 @@ void testPaths_GetServers() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_Get() throws IOException, ParseException, JSONException {
+    void testPaths_Get() throws IOException, JSONException {
         doTest("paths-get.json", Format.JSON);
     }
 
@@ -374,7 +421,7 @@ void testPaths_Get() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_Parameters() throws IOException, ParseException, JSONException {
+    void testPaths_Parameters() throws IOException, JSONException {
         doTest("paths-parameters.json", Format.JSON);
     }
 
@@ -382,7 +429,7 @@ void testPaths_Parameters() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_Ref() throws IOException, ParseException, JSONException {
+    void testPaths_Ref() throws IOException, JSONException {
         doTest("paths-ref.json", Format.JSON);
     }
 
@@ -390,7 +437,7 @@ void testPaths_Ref() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_Servers() throws IOException, ParseException, JSONException {
+    void testPaths_Servers() throws IOException, JSONException {
         doTest("paths-servers.json", Format.JSON);
     }
 
@@ -398,7 +445,7 @@ void testPaths_Servers() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testPaths_Extensions() throws IOException, ParseException, JSONException {
+    void testPaths_Extensions() throws IOException, JSONException {
         doTest("paths-with-extensions.json", Format.JSON);
     }
 
@@ -406,7 +453,7 @@ void testPaths_Extensions() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testSchemas_Discriminator() throws IOException, ParseException, JSONException {
+    void testSchemas_Discriminator() throws IOException, JSONException {
         doTest("schemas-discriminator.json", Format.JSON);
     }
 
@@ -414,7 +461,7 @@ void testSchemas_Discriminator() throws IOException, ParseException, JSONExcepti
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testSchemas_AdditionalProperties() throws IOException, ParseException, JSONException {
+    void testSchemas_AdditionalProperties() throws IOException, JSONException {
         doTest("schemas-with-additionalProperties.json", Format.JSON);
     }
 
@@ -422,7 +469,7 @@ void testSchemas_AdditionalProperties() throws IOException, ParseException, JSON
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testSchemas_AllOf() throws IOException, ParseException, JSONException {
+    void testSchemas_AllOf() throws IOException, JSONException {
         doTest("schemas-with-allOf.json", Format.JSON);
     }
 
@@ -430,7 +477,7 @@ void testSchemas_AllOf() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testSchemas_Composition() throws IOException, ParseException, JSONException {
+    void testSchemas_Composition() throws IOException, JSONException {
         doTest("schemas-with-composition.json", Format.JSON);
     }
 
@@ -438,7 +485,7 @@ void testSchemas_Composition() throws IOException, ParseException, JSONException
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testSchemas_Example() throws IOException, ParseException, JSONException {
+    void testSchemas_Example() throws IOException, JSONException {
         doTest("schemas-with-example.json", Format.JSON);
     }
 
@@ -446,7 +493,7 @@ void testSchemas_Example() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testSchemas_ExternalDocs() throws IOException, ParseException, JSONException {
+    void testSchemas_ExternalDocs() throws IOException, JSONException {
         doTest("schemas-with-externalDocs.json", Format.JSON);
     }
 
@@ -454,7 +501,7 @@ void testSchemas_ExternalDocs() throws IOException, ParseException, JSONExceptio
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testSchemas_MetaData() throws IOException, ParseException, JSONException {
+    void testSchemas_MetaData() throws IOException, JSONException {
         doTest("schemas-with-metaData.json", Format.JSON);
     }
 
@@ -462,7 +509,7 @@ void testSchemas_MetaData() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testSchemas_XML() throws IOException, ParseException, JSONException {
+    void testSchemas_XML() throws IOException, JSONException {
         doTest("schemas-with-xml.json", Format.JSON);
     }
 
@@ -470,7 +517,7 @@ void testSchemas_XML() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testEverything() throws IOException, ParseException, JSONException {
+    void testEverything() throws IOException, JSONException {
         doTest("_everything.json", Format.JSON);
     }
 
@@ -478,8 +525,32 @@ void testEverything() throws IOException, ParseException, JSONException {
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */
     @Test
-    void testEverythingYaml() throws IOException, ParseException, JSONException {
+    void testEverythingYaml() throws IOException, JSONException {
         doTest("_everything.yaml", Format.YAML);
     }
 
+    /**
+     * Test method for {@link OpenApiParser#parse(java.net.URL)}.
+     *
+     * Here we check that {@link OpenApiParser#parse(java.net.URL)} throws an exception
+     * when a file bigger than the maximum allowed size is passed, while
+     * {@link OpenApiParser#parse(InputStream, Format, Integer)} is successful when using a higher limit.
+     */
+    @Test
+    void testParsingBigStaticYamlFile() throws IOException, JSONException {
+        // let's check that parsing a file bigger than the default (3 MB) allowed by the underlying implementation
+        // would fail
+        Path tempFile = generateBigStaticFile();
+        Assertions.assertThrows(JacksonYAMLParseException.class, () -> doTest(tempFile.toUri().toURL(), Format.YAML));
+        // now let's set a higher limit
+        final Integer maximumFileSize = 8 * 1024 * 1024;
+        // and finally, let's parse the file but pass the custom limit
+        try {
+            try (InputStream is = new FileInputStream(tempFile.toFile())) {
+                doTest(tempFile.toUri().toURL(), Format.YAML, OpenApiParser.parse(is, Format.YAML, maximumFileSize));
+            }
+        } finally {
+            System.clearProperty(OpenApiConstants.MAXIMUM_STATIC_FILE_SIZE);
+        }
+    }
 }
diff --git a/core/src/test/java/io/smallrye/openapi/runtime/io/StaticFileConfigTest.java b/core/src/test/java/io/smallrye/openapi/runtime/io/StaticFileConfigTest.java
index 8714b1d59..57e3cd90c 100644
--- a/core/src/test/java/io/smallrye/openapi/runtime/io/StaticFileConfigTest.java
+++ b/core/src/test/java/io/smallrye/openapi/runtime/io/StaticFileConfigTest.java
@@ -2,11 +2,8 @@
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
-import java.io.IOException;
-
 import org.eclipse.microprofile.config.Config;
 import org.eclipse.microprofile.config.ConfigProvider;
-import org.json.JSONException;
 import org.junit.jupiter.api.Test;
 
 import io.smallrye.openapi.api.OpenApiConfig;
@@ -16,11 +13,16 @@
 class StaticFileConfigTest {
 
     @Test
-    void testSettingMaximumFileSize() throws IOException, JSONException {
+    void testSettingMaximumFileSize() {
         final Integer maximumFileSize = 8 * 1024 * 1024;
         System.setProperty(OpenApiConstants.MAXIMUM_STATIC_FILE_SIZE, maximumFileSize.toString());
-        Config config = ConfigProvider.getConfig();
-        OpenApiConfig openApiConfig = OpenApiConfigImpl.fromConfig(config);
-        assertEquals(maximumFileSize, openApiConfig.getMaximumStaticFileSize());
+
+        try {
+            Config config = ConfigProvider.getConfig();
+            OpenApiConfig openApiConfig = OpenApiConfigImpl.fromConfig(config);
+            assertEquals(maximumFileSize, openApiConfig.getMaximumStaticFileSize());
+        } finally {
+            System.clearProperty(OpenApiConstants.MAXIMUM_STATIC_FILE_SIZE);
+        }
     }
 }
diff --git a/core/src/test/resources/io/smallrye/openapi/runtime/io/openapi-fragment-body.yaml b/core/src/test/resources/io/smallrye/openapi/runtime/io/openapi-fragment-body.yaml
new file mode 100644
index 000000000..0f7cedda5
--- /dev/null
+++ b/core/src/test/resources/io/smallrye/openapi/runtime/io/openapi-fragment-body.yaml
@@ -0,0 +1,99 @@
+  /proxys@@ID@@/all:
+    get:
+      summary: Get all @@ID@@ type proxies
+      description: Retrieves and returns the available proxies
+      operationId: getAllProxies
+      responses:
+        "200":
+          description: All available proxies
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/ProxyEntity'
+      x-routing-fqdn: provider.acme.unknown
+      x-string-property: string-value
+      x-boolean-property: true
+      x-number-property: 42
+      x-object-property:
+        property-1: value-1
+        property-2: value-2
+        property-3:
+          prop-3-1: 42
+          prop-3-2: true
+      x-string-array-property:
+      - one
+      - two
+      - three
+      x-object-array-property:
+      - name: item-1
+      - name: item-2
+  /proxy@@ID@@/{code}:
+    get:
+      summary: Get @@ID@@ type proxy by code
+      description: Retrieves and returns the requested @@ID@@ type proxy
+      operationId: getProxyByCode
+      parameters:
+      - name: code
+        in: path
+        required: true
+        schema:
+          type: string
+      - name: excludeObsolete
+        in: query
+        schema:
+          type: boolean
+      responses:
+        "204":
+          description: Requested @@ID@@ type proxy was not found
+        "200":
+          description: Requested @@ID@@ type proxy
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ProxyEntity'
+      x-routing-fqdn: provider.acme.unknown
+    patch:
+      summary: Updates a @@ID@@ type proxy data
+      description: "Retrieves, updates and returns the requested @@ID@@ type proxy data"
+      operationId: updateProxy
+      parameters:
+      - name: code
+        in: path
+        required: true
+        schema:
+          type: string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/ProxyEntity'
+      responses:
+        "404":
+          description: Requested @@ID@@ type proxy was not found
+        "200":
+          description: Updated @@ID@@ type proxy
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ProxyEntity'
+              example: "{\"code\": \"@@ID@@\", \"name\": \"@@ID@@ type proxy\", \"obsolete\"\
+                : false}"
+      x-routing-fqdn: provider.acme.unknown
+      x-string-property: string-value
+      x-boolean-property: true
+      x-number-property: 42
+      x-object-property:
+        property-1: value-1
+        property-2: value-2
+        property-3:
+          prop-3-1: 42
+          prop-3-2: true
+      x-string-array-property:
+      - one
+      - two
+      - three
+      x-object-array-property:
+      - name: item-1
+      - name: item-2
diff --git a/core/src/test/resources/io/smallrye/openapi/runtime/io/openapi-fragment-footer.yaml b/core/src/test/resources/io/smallrye/openapi/runtime/io/openapi-fragment-footer.yaml
new file mode 100644
index 000000000..27c6cc32a
--- /dev/null
+++ b/core/src/test/resources/io/smallrye/openapi/runtime/io/openapi-fragment-footer.yaml
@@ -0,0 +1,11 @@
+components:
+  schemas:
+    ProxyEntity:
+      type: object
+      properties:
+        code:
+          type: string
+        name:
+          type: string
+        obsolete:
+          type: boolean
diff --git a/core/src/test/resources/io/smallrye/openapi/runtime/io/openapi-fragment-header.yaml b/core/src/test/resources/io/smallrye/openapi/runtime/io/openapi-fragment-header.yaml
new file mode 100644
index 000000000..a64d58d76
--- /dev/null
+++ b/core/src/test/resources/io/smallrye/openapi/runtime/io/openapi-fragment-header.yaml
@@ -0,0 +1,6 @@
+---
+openapi: 3.0.0
+info:
+  title: Proxy App
+  version: "1.0"
+paths: