diff --git a/server/src/main/java/org/opensearch/node/InternalSettingsPreparer.java b/server/src/main/java/org/opensearch/node/InternalSettingsPreparer.java
index 828a8e146a2..7d0166cb5c7 100644
--- a/server/src/main/java/org/opensearch/node/InternalSettingsPreparer.java
+++ b/server/src/main/java/org/opensearch/node/InternalSettingsPreparer.java
@@ -81,14 +81,6 @@ public class InternalSettingsPreparer {
         initializeSettings(output, input, properties);
         Environment environment = new Environment(output.build(), configPath);
 
-        if (Files.exists(environment.configFile().resolve("opensearch.yaml"))) {
-            throw new SettingsException("opensearch.yaml was deprecated in 5.5.0 and must be renamed to opensearch.yml");
-        }
-
-        if (Files.exists(environment.configFile().resolve("opensearch.json"))) {
-            throw new SettingsException("opensearch.json was deprecated in 5.5.0 and must be converted to opensearch.yml");
-        }
-
         output = Settings.builder(); // start with a fresh output
         Path path = environment.configFile().resolve("opensearch.yml");
         if (Files.exists(path)) {
diff --git a/server/src/test/java/org/opensearch/node/InternalSettingsPreparerTests.java b/server/src/test/java/org/opensearch/node/InternalSettingsPreparerTests.java
index 6c93a66e3d9..32d18c85014 100644
--- a/server/src/test/java/org/opensearch/node/InternalSettingsPreparerTests.java
+++ b/server/src/test/java/org/opensearch/node/InternalSettingsPreparerTests.java
@@ -114,28 +114,6 @@ public class InternalSettingsPreparerTests extends OpenSearchTestCase {
         }
     }
 
-    @AwaitsFix(bugUrl = "https://github.com/opensearch-project/OpenSearch/issues/358")
-    public void testYamlNotAllowed() throws IOException {
-        InputStream yaml = getClass().getResourceAsStream("/config/opensearch.yml");
-        Path config = homeDir.resolve("config");
-        Files.createDirectory(config);
-        Files.copy(yaml, config.resolve("opensearch.yaml"));
-        SettingsException e = expectThrows(SettingsException.class, () -> InternalSettingsPreparer.prepareEnvironment(
-                Settings.builder().put(baseEnvSettings).build(), emptyMap(), null, DEFAULT_NODE_NAME_SHOULDNT_BE_CALLED));
-        assertEquals("opensearch.yaml was deprecated in 5.5.0 and must be renamed to opensearch.yml", e.getMessage());
-    }
-
-    @AwaitsFix(bugUrl = "https://github.com/opensearch-project/OpenSearch/issues/358")
-    public void testJsonNotAllowed() throws IOException {
-        InputStream yaml = getClass().getResourceAsStream("/config/opensearch.json");
-        Path config = homeDir.resolve("config");
-        Files.createDirectory(config);
-        Files.copy(yaml, config.resolve("opensearch.json"));
-        SettingsException e = expectThrows(SettingsException.class, () -> InternalSettingsPreparer.prepareEnvironment(
-                Settings.builder().put(baseEnvSettings).build(), emptyMap(), null, DEFAULT_NODE_NAME_SHOULDNT_BE_CALLED));
-        assertEquals("opensearch.json was deprecated in 5.5.0 and must be converted to opensearch.yml", e.getMessage());
-    }
-
     public void testSecureSettings() {
         MockSecureSettings secureSettings = new MockSecureSettings();
         secureSettings.setString("foo", "secret");