diff --git a/src/qsharp/qsharp.test.ts b/src/qsharp/qsharp.test.ts
index f24f344d..c2889067 100644
--- a/src/qsharp/qsharp.test.ts
+++ b/src/qsharp/qsharp.test.ts
@@ -6,5 +6,157 @@
 import { testTokenization } from '../test/testRunner';
 
 testTokenization('qsharp', [
-
+	// Generated from sample: https://github.com/microsoft/Quantum/blob/main/samples/azure-quantum/parallel-qrng/ParallelQrng.ipynb
+	[
+		{
+			line: 'open Microsoft.Quantum.Arrays;',
+			tokens: [
+				{ startIndex: 0, type: 'keyword.open.qsharp' },
+				{ startIndex: 4, type: 'white.qsharp' },
+				{ startIndex: 5, type: 'namespace.qsharp' },
+				{ startIndex: 14, type: 'delimiter.qsharp' },
+				{ startIndex: 15, type: 'namespace.qsharp' },
+				{ startIndex: 22, type: 'delimiter.qsharp' },
+				{ startIndex: 23, type: 'namespace.qsharp' },
+				{ startIndex: 29, type: 'delimiter.qsharp' }
+			]
+		},
+		{
+			line: 'open Microsoft.Quantum.Measurement;',
+			tokens: [
+				{ startIndex: 0, type: 'keyword.open.qsharp' },
+				{ startIndex: 4, type: 'white.qsharp' },
+				{ startIndex: 5, type: 'namespace.qsharp' },
+				{ startIndex: 14, type: 'delimiter.qsharp' },
+				{ startIndex: 15, type: 'namespace.qsharp' },
+				{ startIndex: 22, type: 'delimiter.qsharp' },
+				{ startIndex: 23, type: 'namespace.qsharp' },
+				{ startIndex: 34, type: 'delimiter.qsharp' }
+			]
+		},
+		{
+			line: '',
+			tokens: []
+		},
+		{
+			line: 'operation SampleRandomNumber(nQubits : Int) : Result[] {',
+			tokens: [
+				{ startIndex: 0, type: 'keyword.qsharp' },
+				{ startIndex: 9, type: 'white.qsharp' },
+				{ startIndex: 10, type: 'identifier.qsharp' },
+				{ startIndex: 28, type: 'delimiter.parenthesis.qsharp' },
+				{ startIndex: 29, type: 'identifier.qsharp' },
+				{ startIndex: 36, type: 'white.qsharp' },
+				{ startIndex: 37, type: 'operator.qsharp' },
+				{ startIndex: 38, type: 'white.qsharp' },
+				{ startIndex: 39, type: 'type.qsharp' },
+				{ startIndex: 42, type: 'delimiter.parenthesis.qsharp' },
+				{ startIndex: 43, type: 'white.qsharp' },
+				{ startIndex: 44, type: 'operator.qsharp' },
+				{ startIndex: 45, type: 'white.qsharp' },
+				{ startIndex: 46, type: 'type.qsharp' },
+				{ startIndex: 52, type: 'delimiter.square.qsharp' },
+				{ startIndex: 54, type: 'white.qsharp' },
+				{ startIndex: 55, type: 'delimiter.curly.qsharp' }
+			]
+		},
+		{
+			line: '	// We prepare a register of qubits in a uniform',
+			tokens: [
+				{ startIndex: 0, type: 'white.qsharp' },
+				{ startIndex: 1, type: 'comment.qsharp' }
+			]
+		},
+		{
+			line: '	// superposition state, such that when we measure,',
+			tokens: [
+				{ startIndex: 0, type: 'white.qsharp' },
+				{ startIndex: 1, type: 'comment.qsharp' }
+			]
+		},
+		{
+			line: '	// all bitstrings occur with equal probability.',
+			tokens: [
+				{ startIndex: 0, type: 'white.qsharp' },
+				{ startIndex: 1, type: 'comment.qsharp' }
+			]
+		},
+		{
+			line: '	use register = Qubit[nQubits] {',
+			tokens: [
+				{ startIndex: 0, type: 'white.qsharp' },
+				{ startIndex: 1, type: 'keyword.qsharp' },
+				{ startIndex: 4, type: 'white.qsharp' },
+				{ startIndex: 5, type: 'identifier.qsharp' },
+				{ startIndex: 13, type: 'white.qsharp' },
+				{ startIndex: 14, type: 'operator.qsharp' },
+				{ startIndex: 15, type: 'white.qsharp' },
+				{ startIndex: 16, type: 'type.qsharp' },
+				{ startIndex: 21, type: 'delimiter.square.qsharp' },
+				{ startIndex: 22, type: 'identifier.qsharp' },
+				{ startIndex: 29, type: 'delimiter.square.qsharp' },
+				{ startIndex: 30, type: 'white.qsharp' },
+				{ startIndex: 31, type: 'delimiter.curly.qsharp' }
+			]
+		},
+		{
+			line: '		// Set qubits in superposition.',
+			tokens: [
+				{ startIndex: 0, type: 'white.qsharp' },
+				{ startIndex: 2, type: 'comment.qsharp' }
+			]
+		},
+		{
+			line: '		ApplyToEachA(H, register);',
+			tokens: [
+				{ startIndex: 0, type: 'white.qsharp' },
+				{ startIndex: 2, type: 'identifier.qsharp' },
+				{ startIndex: 14, type: 'delimiter.parenthesis.qsharp' },
+				{ startIndex: 15, type: 'keyword.qsharp' },
+				{ startIndex: 16, type: 'delimiter.qsharp' },
+				{ startIndex: 17, type: 'white.qsharp' },
+				{ startIndex: 18, type: 'identifier.qsharp' },
+				{ startIndex: 26, type: 'delimiter.parenthesis.qsharp' },
+				{ startIndex: 27, type: 'delimiter.qsharp' }
+			]
+		},
+		{
+			line: '',
+			tokens: []
+		},
+		{
+			line: '		// Measure all qubits and return.',
+			tokens: [
+				{ startIndex: 0, type: 'white.qsharp' },
+				{ startIndex: 2, type: 'comment.qsharp' }
+			]
+		},
+		{
+			line: '		return ForEach(MResetZ, register);',
+			tokens: [
+				{ startIndex: 0, type: 'white.qsharp' },
+				{ startIndex: 2, type: 'keyword.qsharp' },
+				{ startIndex: 8, type: 'white.qsharp' },
+				{ startIndex: 9, type: 'identifier.qsharp' },
+				{ startIndex: 16, type: 'delimiter.parenthesis.qsharp' },
+				{ startIndex: 17, type: 'identifier.qsharp' },
+				{ startIndex: 24, type: 'delimiter.qsharp' },
+				{ startIndex: 25, type: 'white.qsharp' },
+				{ startIndex: 26, type: 'identifier.qsharp' },
+				{ startIndex: 34, type: 'delimiter.parenthesis.qsharp' },
+				{ startIndex: 35, type: 'delimiter.qsharp' }
+			]
+		},
+		{
+			line: '	}',
+			tokens: [
+				{ startIndex: 0, type: 'white.qsharp' },
+				{ startIndex: 1, type: 'delimiter.curly.qsharp' }
+			]
+		},
+		{
+			line: '}',
+			tokens: [{ startIndex: 0, type: 'delimiter.curly.qsharp' }]
+		}
+	]
 ]);
diff --git a/src/qsharp/qsharp.ts b/src/qsharp/qsharp.ts
index 3093fef6..f4141338 100644
--- a/src/qsharp/qsharp.ts
+++ b/src/qsharp/qsharp.ts
@@ -30,8 +30,6 @@ export const conf: languages.LanguageConfiguration = {
 
 export const language = <languages.IMonarchLanguage>{
 	// Set defaultToken to invalid to see what you do not tokenize yet
-	defaultToken: 'invalid',
-
 	keywords: [
 		'namespace',
 		'open',
@@ -240,6 +238,8 @@ export const language = <languages.IMonarchLanguage>{
 		'w/='
 	],
 
+	namespaceFollows: ['namespace', 'open'],
+
 	symbols: /[=><!~?:&|+\-*\/\^%@._]+/,
 
 	escapes: /\\[\s\S]/,
@@ -252,6 +252,10 @@ export const language = <languages.IMonarchLanguage>{
 				/[a-zA-Z_$][\w$]*/,
 				{
 					cases: {
+						'@namespaceFollows': {
+							token: 'keyword.$0',
+							next: '@namespace'
+						},
 						'@typeKeywords': 'type',
 						'@keywords': 'keyword',
 						'@constants': 'constant',
@@ -287,6 +291,13 @@ export const language = <languages.IMonarchLanguage>{
 			[/"/, { token: 'string.quote', bracket: '@close', next: '@pop' }]
 		],
 
+		namespace: [
+			{ include: '@whitespace' },
+			[/[A-Za-z]\w*/, 'namespace'],
+			[/[\.=]/, 'delimiter'],
+			['', '', '@pop']
+		],
+
 		whitespace: [
 			[/[ \t\r\n]+/, 'white'],
 			[/(\/\/).*/, 'comment']