diff --git a/vscode-extensions/commons/language-server-test-harness/src/main/java/org/springframework/ide/vscode/languageserver/testharness/Editor.java b/vscode-extensions/commons/language-server-test-harness/src/main/java/org/springframework/ide/vscode/languageserver/testharness/Editor.java
index bc2fe3d37..f49f91f1f 100644
--- a/vscode-extensions/commons/language-server-test-harness/src/main/java/org/springframework/ide/vscode/languageserver/testharness/Editor.java
+++ b/vscode-extensions/commons/language-server-test-harness/src/main/java/org/springframework/ide/vscode/languageserver/testharness/Editor.java
@@ -99,7 +99,7 @@ public class Editor {
 		this.harness = harness;
 		this.languageId = languageId;
 		EditorState state = new EditorState(contents);
-		this.document = harness.openDocument(harness.createWorkingCopy(state.documentContents));
+		this.document = harness.openDocument(harness.createWorkingCopy(state.documentContents, languageId));
 		this.selectionStart = state.selectionStart;
 		this.selectionEnd = state.selectionEnd;
 		this.ignoredTypes = new HashSet<>();
diff --git a/vscode-extensions/commons/language-server-test-harness/src/main/java/org/springframework/ide/vscode/languageserver/testharness/LanguageServerHarness.java b/vscode-extensions/commons/language-server-test-harness/src/main/java/org/springframework/ide/vscode/languageserver/testharness/LanguageServerHarness.java
index e02ae7b08..3232da307 100644
--- a/vscode-extensions/commons/language-server-test-harness/src/main/java/org/springframework/ide/vscode/languageserver/testharness/LanguageServerHarness.java
+++ b/vscode-extensions/commons/language-server-test-harness/src/main/java/org/springframework/ide/vscode/languageserver/testharness/LanguageServerHarness.java
@@ -81,23 +81,23 @@ public class LanguageServerHarness {
 		this(factory, LanguageIds.PLAINTEXT);
 	}
 
-	public synchronized TextDocumentInfo getOrReadFile(File file) throws Exception {
+	public synchronized TextDocumentInfo getOrReadFile(File file, String languageId) throws Exception {
 		String uri = file.toURI().toString();
 		TextDocumentInfo d = documents.get(uri);
 		if (d==null) {
-			documents.put(uri, d = readFile(file));
+			documents.put(uri, d = readFile(file, languageId));
 		}
 		return d;
 	}
 
-	public TextDocumentInfo readFile(File file) throws Exception {
+	public TextDocumentInfo readFile(File file, String languageId) throws Exception {
 		byte[] encoded = Files.readAllBytes(file.toPath());
 		String content = new String(encoded, getEncoding());
 		TextDocumentItem document = new TextDocumentItem();
 		document.setText(content);
 		document.setUri(file.toURI().toString());
 		document.setVersion(getFirstVersion());
-		document.setLanguageId(getDefaultLanguageId());
+		document.setLanguageId(languageId);
 		return new TextDocumentInfo(document);
 	}
 
@@ -188,8 +188,8 @@ public class LanguageServerHarness {
 		return documentInfo;
 	}
 
-	public TextDocumentInfo openDocument(File file) throws Exception {
-		return openDocument(getOrReadFile(file));
+	public TextDocumentInfo openDocument(File file, String languageId) throws Exception {
+		return openDocument(getOrReadFile(file, languageId));
 	}
 
 	public synchronized TextDocumentInfo changeDocument(String uri, int start, int end, String replaceText) {
@@ -330,9 +330,13 @@ public class LanguageServerHarness {
 		return new Editor(this, contents, getDefaultLanguageId());
 	}
 
-	public synchronized TextDocumentInfo createWorkingCopy(String contents) throws Exception {
+	public Editor newEditor(String languageId, String contents) throws Exception {
+		return new Editor(this, contents, languageId);
+	}
+
+	public synchronized TextDocumentInfo createWorkingCopy(String contents, String languageId) throws Exception {
 		TextDocumentItem doc = new TextDocumentItem();
-		doc.setLanguageId(getDefaultLanguageId());
+		doc.setLanguageId(languageId);
 		doc.setText(contents);
 		doc.setUri(createTempUri());
 		doc.setVersion(getFirstVersion());
diff --git a/vscode-extensions/vscode-concourse/src/test/java/org/springframework/ide/vscode/concourse/ConcourseEditorTest.java b/vscode-extensions/vscode-concourse/src/test/java/org/springframework/ide/vscode/concourse/ConcourseEditorTest.java
index 8992c36c8..627f4b64f 100644
--- a/vscode-extensions/vscode-concourse/src/test/java/org/springframework/ide/vscode/concourse/ConcourseEditorTest.java
+++ b/vscode-extensions/vscode-concourse/src/test/java/org/springframework/ide/vscode/concourse/ConcourseEditorTest.java
@@ -1454,6 +1454,31 @@ public class ConcourseEditorTest {
 
 	}
 
+	@Test public void reconcileTaskFileToplevelProperties() throws Exception {
+		Editor editor = harness.newEditor(LanguageIds.CONCOURSE_TASK,
+				"platform: a-platform\n" +
+				"image_resource:\n" +
+				"  type: docker-image\n" +
+				"  source:\n" +
+				"    bogus-source-prop: bad\n" +
+				"    repository: ruby\n" +
+				"    tag: '2.1'\n" +
+				"image: some-image\n" +
+				"inputs:\n" +
+				"- path: path/to/input\n" +
+				"outputs:\n" +
+				"- path: path/to/output\n" +
+				"run:\n" +
+				"  path: my-app/scripts/test"
+		);
+		editor.assertProblems(
+				"a-platform|blah",
+				"bogus-source-prop|Unkown property",
+				"path: path/to/input|'name' is required",
+				"path: path/to/output|'name' is required"
+		);
+	}
+
 	//////////////////////////////////////////////////////////////////////////////
 
 	private void assertContextualCompletions(String conText, String textBefore, String... textAfter) throws Exception {