diff --git a/src/utils/FileEmitter.ts b/src/utils/FileEmitter.ts
index 0b29ae20748..8bab92e8ff4 100644
--- a/src/utils/FileEmitter.ts
+++ b/src/utils/FileEmitter.ts
@@ -10,7 +10,6 @@ import {
 	errAssetSourceAlreadySet,
 	errChunkNotGeneratedForFileName,
 	errFailedValidation,
-	errFileNameConflict,
 	errFileReferenceIdNotFoundForFilename,
 	errInvalidRollupPhaseForChunkEmission,
 	errNoAssetSourceSet,
@@ -50,7 +49,8 @@ function generateAssetFileName(
 
 function reserveFileNameInBundle(fileName: string, bundle: OutputBundleWithPlaceholders) {
 	if (fileName in bundle) {
-		return error(errFileNameConflict(fileName));
+		// FIXME this should return error(errFileNameConflict(fileName));
+		// but until #3174 is fixed, this raises spurious errors and is disabled
 	}
 	bundle[fileName] = FILE_PLACEHOLDER;
 }
diff --git a/test/chunking-form/samples/emit-same-file/_config.js b/test/chunking-form/samples/emit-same-file/_config.js
new file mode 100644
index 00000000000..af34504e833
--- /dev/null
+++ b/test/chunking-form/samples/emit-same-file/_config.js
@@ -0,0 +1,12 @@
+module.exports = {
+	options: {
+		input: 'main.js',
+		plugins: [
+			{
+				generateBundle() {
+					this.emitFile({ type: 'asset', fileName: 'myfile', source: 'abc' });
+				}
+			}
+		]
+	}
+};
diff --git a/test/chunking-form/samples/emit-same-file/_expected/amd/main.js b/test/chunking-form/samples/emit-same-file/_expected/amd/main.js
new file mode 100644
index 00000000000..f99c5d38fdf
--- /dev/null
+++ b/test/chunking-form/samples/emit-same-file/_expected/amd/main.js
@@ -0,0 +1,9 @@
+define(['exports'], function (exports) { 'use strict';
+
+	function hi() { return 2 }
+
+	exports.hi = hi;
+
+	Object.defineProperty(exports, '__esModule', { value: true });
+
+});
diff --git a/test/chunking-form/samples/emit-same-file/_expected/amd/myfile b/test/chunking-form/samples/emit-same-file/_expected/amd/myfile
new file mode 100644
index 00000000000..f2ba8f84ab5
--- /dev/null
+++ b/test/chunking-form/samples/emit-same-file/_expected/amd/myfile
@@ -0,0 +1 @@
+abc
\ No newline at end of file
diff --git a/test/chunking-form/samples/emit-same-file/_expected/cjs/main.js b/test/chunking-form/samples/emit-same-file/_expected/cjs/main.js
new file mode 100644
index 00000000000..ce637f0dcc8
--- /dev/null
+++ b/test/chunking-form/samples/emit-same-file/_expected/cjs/main.js
@@ -0,0 +1,7 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+function hi() { return 2 }
+
+exports.hi = hi;
diff --git a/test/chunking-form/samples/emit-same-file/_expected/cjs/myfile b/test/chunking-form/samples/emit-same-file/_expected/cjs/myfile
new file mode 100644
index 00000000000..f2ba8f84ab5
--- /dev/null
+++ b/test/chunking-form/samples/emit-same-file/_expected/cjs/myfile
@@ -0,0 +1 @@
+abc
\ No newline at end of file
diff --git a/test/chunking-form/samples/emit-same-file/_expected/es/main.js b/test/chunking-form/samples/emit-same-file/_expected/es/main.js
new file mode 100644
index 00000000000..47c2f790880
--- /dev/null
+++ b/test/chunking-form/samples/emit-same-file/_expected/es/main.js
@@ -0,0 +1,3 @@
+function hi() { return 2 }
+
+export { hi };
diff --git a/test/chunking-form/samples/emit-same-file/_expected/es/myfile b/test/chunking-form/samples/emit-same-file/_expected/es/myfile
new file mode 100644
index 00000000000..f2ba8f84ab5
--- /dev/null
+++ b/test/chunking-form/samples/emit-same-file/_expected/es/myfile
@@ -0,0 +1 @@
+abc
\ No newline at end of file
diff --git a/test/chunking-form/samples/emit-same-file/_expected/system/main.js b/test/chunking-form/samples/emit-same-file/_expected/system/main.js
new file mode 100644
index 00000000000..0581de90888
--- /dev/null
+++ b/test/chunking-form/samples/emit-same-file/_expected/system/main.js
@@ -0,0 +1,12 @@
+System.register([], function (exports) {
+	'use strict';
+	return {
+		execute: function () {
+
+			exports('hi', hi);
+
+			function hi() { return 2 }
+
+		}
+	};
+});
diff --git a/test/chunking-form/samples/emit-same-file/_expected/system/myfile b/test/chunking-form/samples/emit-same-file/_expected/system/myfile
new file mode 100644
index 00000000000..f2ba8f84ab5
--- /dev/null
+++ b/test/chunking-form/samples/emit-same-file/_expected/system/myfile
@@ -0,0 +1 @@
+abc
\ No newline at end of file
diff --git a/test/chunking-form/samples/emit-same-file/main.js b/test/chunking-form/samples/emit-same-file/main.js
new file mode 100644
index 00000000000..be03a2f1d9f
--- /dev/null
+++ b/test/chunking-form/samples/emit-same-file/main.js
@@ -0,0 +1 @@
+export function hi() { return 2 }
diff --git a/test/function/samples/emit-file/emit-named-asset-conflict-build-generate/_config.js b/test/function/samples/emit-file/emit-named-asset-conflict-build-generate/_config.js
deleted file mode 100644
index c148dcc7912..00000000000
--- a/test/function/samples/emit-file/emit-named-asset-conflict-build-generate/_config.js
+++ /dev/null
@@ -1,31 +0,0 @@
-module.exports = {
-	description:
-		'throws when there is a conflict between two named assets emitted during different phases',
-	options: {
-		input: 'main',
-		plugins: {
-			buildStart() {
-				this.emitFile({
-					type: 'asset',
-					fileName: 'custom/emitted.txt',
-					source: 'text'
-				});
-			},
-			renderStart() {
-				this.emitFile({
-					type: 'asset',
-					fileName: 'custom/emitted.txt',
-					source: 'text'
-				});
-			}
-		}
-	},
-	generateError: {
-		code: 'PLUGIN_ERROR',
-		hook: 'renderStart',
-		message:
-			'Could not emit file "custom/emitted.txt" as it conflicts with an already emitted file.',
-		plugin: 'at position 1',
-		pluginCode: 'FILE_NAME_CONFLICT'
-	}
-};
diff --git a/test/function/samples/emit-file/emit-named-asset-conflict-build-generate/main.js b/test/function/samples/emit-file/emit-named-asset-conflict-build-generate/main.js
deleted file mode 100644
index c0b933d7b56..00000000000
--- a/test/function/samples/emit-file/emit-named-asset-conflict-build-generate/main.js
+++ /dev/null
@@ -1 +0,0 @@
-console.log('main');
diff --git a/test/function/samples/emit-file/emit-named-chunk-conflict/_config.js b/test/function/samples/emit-file/emit-named-chunk-conflict/_config.js
deleted file mode 100644
index dfc45b3f266..00000000000
--- a/test/function/samples/emit-file/emit-named-chunk-conflict/_config.js
+++ /dev/null
@@ -1,25 +0,0 @@
-module.exports = {
-	description: 'throws when there is a conflict between two emitted named chunks',
-	options: {
-		input: 'main',
-		plugins: {
-			buildStart() {
-				this.emitFile({
-					type: 'chunk',
-					id: 'buildStart1',
-					fileName: 'custom/build-start-chunk.js'
-				});
-				this.emitFile({
-					type: 'chunk',
-					id: 'buildStart2',
-					fileName: 'custom/build-start-chunk.js'
-				});
-			}
-		}
-	},
-	generateError: {
-		code: 'FILE_NAME_CONFLICT',
-		message:
-			'Could not emit file "custom/build-start-chunk.js" as it conflicts with an already emitted file.'
-	}
-};
diff --git a/test/function/samples/emit-file/emit-named-chunk-conflict/buildStart1.js b/test/function/samples/emit-file/emit-named-chunk-conflict/buildStart1.js
deleted file mode 100644
index 4c326cae1bc..00000000000
--- a/test/function/samples/emit-file/emit-named-chunk-conflict/buildStart1.js
+++ /dev/null
@@ -1 +0,0 @@
-console.log('buildStart1');
diff --git a/test/function/samples/emit-file/emit-named-chunk-conflict/buildStart2.js b/test/function/samples/emit-file/emit-named-chunk-conflict/buildStart2.js
deleted file mode 100644
index a74fcff5302..00000000000
--- a/test/function/samples/emit-file/emit-named-chunk-conflict/buildStart2.js
+++ /dev/null
@@ -1 +0,0 @@
-console.log('buildStart2');
diff --git a/test/function/samples/emit-file/emit-named-chunk-conflict/main.js b/test/function/samples/emit-file/emit-named-chunk-conflict/main.js
deleted file mode 100644
index c0b933d7b56..00000000000
--- a/test/function/samples/emit-file/emit-named-chunk-conflict/main.js
+++ /dev/null
@@ -1 +0,0 @@
-console.log('main');