diff --git a/test/Microsoft.AspNetCore.Blazor.Build.Test/DesignTimeCodeGenerationTest.cs b/test/Microsoft.AspNetCore.Blazor.Build.Test/DesignTimeCodeGenerationTest.cs
index 613c880a57..db68ebb1dc 100644
--- a/test/Microsoft.AspNetCore.Blazor.Build.Test/DesignTimeCodeGenerationTest.cs
+++ b/test/Microsoft.AspNetCore.Blazor.Build.Test/DesignTimeCodeGenerationTest.cs
@@ -407,6 +407,38 @@ Welcome to your new app.
                 d => Assert.Equal("RZ1035", d.Id));
         }
 
+        [Fact] // https://github.com/aspnet/Blazor/issues/773
+        public void Regression_773()
+        {
+            // Arrange
+            AdditionalSyntaxTrees.Add(Parse(@"
+using Microsoft.AspNetCore.Blazor.Components;
+
+namespace Test
+{
+    public class SurveyPrompt : BlazorComponent
+    {
+        [Parameter] private string Title { get; set; }
+    }
+}
+"));
+
+            // Act
+            var generated = CompileToCSharp(@"
+@page ""/""
+
+<h1>Hello, world!</h1>
+
+Welcome to your new app.
+
+<SurveyPrompt Title=""<div>Test!</div>"" />
+");
+
+            // Assert
+            AssertDocumentNodeMatchesBaseline(generated.CodeDocument);
+            AssertCSharpDocumentMatchesBaseline(generated.CodeDocument);
+        }
+
         [Fact]
         public void BindToComponent_SpecifiesValue_WithMatchingProperties()
         {
diff --git a/test/Microsoft.AspNetCore.Blazor.Build.Test/RuntimeCodeGenerationTest.cs b/test/Microsoft.AspNetCore.Blazor.Build.Test/RuntimeCodeGenerationTest.cs
index 07692a6447..13465e77fe 100644
--- a/test/Microsoft.AspNetCore.Blazor.Build.Test/RuntimeCodeGenerationTest.cs
+++ b/test/Microsoft.AspNetCore.Blazor.Build.Test/RuntimeCodeGenerationTest.cs
@@ -657,6 +657,38 @@ Welcome to your new app.
                 d => Assert.Equal("RZ1035", d.Id));
         }
 
+        [Fact] // https://github.com/aspnet/Blazor/issues/773
+        public void Regression_773()
+        {
+            // Arrange
+            AdditionalSyntaxTrees.Add(Parse(@"
+using Microsoft.AspNetCore.Blazor.Components;
+
+namespace Test
+{
+    public class SurveyPrompt : BlazorComponent
+    {
+        [Parameter] private string Title { get; set; }
+    }
+}
+"));
+
+            // Act
+            var generated = CompileToCSharp(@"
+@page ""/""
+
+<h1>Hello, world!</h1>
+
+Welcome to your new app.
+
+<SurveyPrompt Title=""<div>Test!</div>"" />
+");
+
+            // Assert
+            AssertDocumentNodeMatchesBaseline(generated.CodeDocument);
+            AssertCSharpDocumentMatchesBaseline(generated.CodeDocument);
+        }
+
         [Fact]
         public void BindToComponent_SpecifiesValue_WithMatchingProperties()
         {
diff --git a/test/Microsoft.AspNetCore.Blazor.Build.Test/TestFiles/DesignTimeCodeGenerationTest/Regression_773/TestComponent.codegen.cs b/test/Microsoft.AspNetCore.Blazor.Build.Test/TestFiles/DesignTimeCodeGenerationTest/Regression_773/TestComponent.codegen.cs
new file mode 100644
index 0000000000..41a4248217
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Blazor.Build.Test/TestFiles/DesignTimeCodeGenerationTest/Regression_773/TestComponent.codegen.cs
@@ -0,0 +1,34 @@
+// <auto-generated/>
+#pragma warning disable 1591
+namespace Test
+{
+    #line hidden
+    using System;
+    using System.Collections.Generic;
+    using System.Linq;
+    using System.Threading.Tasks;
+    using Microsoft.AspNetCore.Blazor;
+    using Microsoft.AspNetCore.Blazor.Components;
+    [Microsoft.AspNetCore.Blazor.Components.RouteAttribute("/")]
+    public class TestComponent : Microsoft.AspNetCore.Blazor.Components.BlazorComponent
+    {
+        #pragma warning disable 219
+        private void __RazorDirectiveTokenHelpers__() {
+        ((System.Action)(() => {
+global::System.Object __typeHelper = "/";
+        }
+        ))();
+        }
+        #pragma warning restore 219
+        #pragma warning disable 0414
+        private static System.Object __o = null;
+        #pragma warning restore 0414
+        #pragma warning disable 1998
+        protected override void BuildRenderTree(Microsoft.AspNetCore.Blazor.RenderTree.RenderTreeBuilder builder)
+        {
+            base.BuildRenderTree(builder);
+        }
+        #pragma warning restore 1998
+    }
+}
+#pragma warning restore 1591
diff --git a/test/Microsoft.AspNetCore.Blazor.Build.Test/TestFiles/DesignTimeCodeGenerationTest/Regression_773/TestComponent.ir.txt b/test/Microsoft.AspNetCore.Blazor.Build.Test/TestFiles/DesignTimeCodeGenerationTest/Regression_773/TestComponent.ir.txt
new file mode 100644
index 0000000000..96218d8006
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Blazor.Build.Test/TestFiles/DesignTimeCodeGenerationTest/Regression_773/TestComponent.ir.txt
@@ -0,0 +1,36 @@
+Document - 
+    NamespaceDeclaration -  - Test
+        UsingDirective - (3:1,1 [12] ) - System
+        UsingDirective - (18:2,1 [32] ) - System.Collections.Generic
+        UsingDirective - (53:3,1 [17] ) - System.Linq
+        UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
+        UsingDirective - (104:5,1 [33] ) - Microsoft.AspNetCore.Blazor
+        UsingDirective - (140:6,1 [44] ) - Microsoft.AspNetCore.Blazor.Components
+        RouteAttributeExtensionNode -  - /
+        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Blazor.Components.BlazorComponent - 
+            DesignTimeDirective - 
+                DirectiveToken - (14:0,14 [32] ) - "*, Microsoft.AspNetCore.Blazor"
+                DirectiveToken - (14:0,14 [9] ) - "*, Test"
+                DirectiveToken - (6:0,6 [3] x:\dir\subdir\Test\TestComponent.cshtml) - "/"
+            CSharpCode - 
+                IntermediateToken -  - CSharp - #pragma warning disable 0414
+            CSharpCode - 
+                IntermediateToken -  - CSharp - private static System.Object __o = null;
+            CSharpCode - 
+                IntermediateToken -  - CSharp - #pragma warning restore 0414
+            MethodDeclaration -  - protected override - void - BuildRenderTree
+                CSharpCode - 
+                    IntermediateToken -  - CSharp - base.BuildRenderTree(builder);
+                HtmlContent - (11:1,0 [2] x:\dir\subdir\Test\TestComponent.cshtml)
+                    IntermediateToken - (11:1,0 [2] x:\dir\subdir\Test\TestComponent.cshtml) - Html - \n
+                HtmlElement - (13:2,0 [22] x:\dir\subdir\Test\TestComponent.cshtml) - h1
+                    HtmlContent - (17:2,4 [13] x:\dir\subdir\Test\TestComponent.cshtml)
+                        IntermediateToken - (17:2,4 [13] x:\dir\subdir\Test\TestComponent.cshtml) - Html - Hello, world!
+                HtmlContent - (35:2,22 [32] x:\dir\subdir\Test\TestComponent.cshtml)
+                    IntermediateToken - (35:2,22 [32] x:\dir\subdir\Test\TestComponent.cshtml) - Html - \n\nWelcome to your new app.\n\n
+                HtmlElement - (67:6,0 [41] x:\dir\subdir\Test\TestComponent.cshtml) - surveyprompt
+                    HtmlAttribute -  -  - 
+                        HtmlAttributeValue -  - 
+                            IntermediateToken -  - Html - <div>Test!</div>
+                HtmlContent - (108:6,41 [2] x:\dir\subdir\Test\TestComponent.cshtml)
+                    IntermediateToken - (108:6,41 [2] x:\dir\subdir\Test\TestComponent.cshtml) - Html - \n
diff --git a/test/Microsoft.AspNetCore.Blazor.Build.Test/TestFiles/DesignTimeCodeGenerationTest/Regression_773/TestComponent.mappings.txt b/test/Microsoft.AspNetCore.Blazor.Build.Test/TestFiles/DesignTimeCodeGenerationTest/Regression_773/TestComponent.mappings.txt
new file mode 100644
index 0000000000..e0c00d34b3
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Blazor.Build.Test/TestFiles/DesignTimeCodeGenerationTest/Regression_773/TestComponent.mappings.txt
@@ -0,0 +1,5 @@
+Source Location: (6:0,6 [3] x:\dir\subdir\Test\TestComponent.cshtml)
+|"/"|
+Generated Location: (624:17,37 [3] )
+|"/"|
+
diff --git a/test/Microsoft.AspNetCore.Blazor.Build.Test/TestFiles/RuntimeCodeGenerationTest/Regression_773/TestComponent.codegen.cs b/test/Microsoft.AspNetCore.Blazor.Build.Test/TestFiles/RuntimeCodeGenerationTest/Regression_773/TestComponent.codegen.cs
new file mode 100644
index 0000000000..f3807189a3
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Blazor.Build.Test/TestFiles/RuntimeCodeGenerationTest/Regression_773/TestComponent.codegen.cs
@@ -0,0 +1,30 @@
+// <auto-generated/>
+#pragma warning disable 1591
+namespace Test
+{
+    #line hidden
+    using System;
+    using System.Collections.Generic;
+    using System.Linq;
+    using System.Threading.Tasks;
+    using Microsoft.AspNetCore.Blazor;
+    using Microsoft.AspNetCore.Blazor.Components;
+    [Microsoft.AspNetCore.Blazor.Components.RouteAttribute("/")]
+    public class TestComponent : Microsoft.AspNetCore.Blazor.Components.BlazorComponent
+    {
+        #pragma warning disable 1998
+        protected override void BuildRenderTree(Microsoft.AspNetCore.Blazor.RenderTree.RenderTreeBuilder builder)
+        {
+            base.BuildRenderTree(builder);
+            builder.OpenElement(0, "h1");
+            builder.AddContent(1, "Hello, world!");
+            builder.CloseElement();
+            builder.AddContent(2, "\n\nWelcome to your new app.\n\n");
+            builder.OpenElement(3, "surveyprompt");
+            builder.AddAttribute(4, "title", "<div>Test!</div>");
+            builder.CloseElement();
+        }
+        #pragma warning restore 1998
+    }
+}
+#pragma warning restore 1591
diff --git a/test/Microsoft.AspNetCore.Blazor.Build.Test/TestFiles/RuntimeCodeGenerationTest/Regression_773/TestComponent.ir.txt b/test/Microsoft.AspNetCore.Blazor.Build.Test/TestFiles/RuntimeCodeGenerationTest/Regression_773/TestComponent.ir.txt
new file mode 100644
index 0000000000..0b1144b537
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Blazor.Build.Test/TestFiles/RuntimeCodeGenerationTest/Regression_773/TestComponent.ir.txt
@@ -0,0 +1,22 @@
+Document - 
+    NamespaceDeclaration -  - Test
+        UsingDirective - (3:1,1 [14] ) - System
+        UsingDirective - (18:2,1 [34] ) - System.Collections.Generic
+        UsingDirective - (53:3,1 [19] ) - System.Linq
+        UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
+        UsingDirective - (104:5,1 [35] ) - Microsoft.AspNetCore.Blazor
+        UsingDirective - (140:6,1 [46] ) - Microsoft.AspNetCore.Blazor.Components
+        RouteAttributeExtensionNode -  - /
+        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Blazor.Components.BlazorComponent - 
+            MethodDeclaration -  - protected override - void - BuildRenderTree
+                CSharpCode - 
+                    IntermediateToken -  - CSharp - base.BuildRenderTree(builder);
+                HtmlElement - (13:2,0 [22] x:\dir\subdir\Test\TestComponent.cshtml) - h1
+                    HtmlContent - (17:2,4 [13] x:\dir\subdir\Test\TestComponent.cshtml)
+                        IntermediateToken - (17:2,4 [13] x:\dir\subdir\Test\TestComponent.cshtml) - Html - Hello, world!
+                HtmlContent - (35:2,22 [32] x:\dir\subdir\Test\TestComponent.cshtml)
+                    IntermediateToken - (35:2,22 [32] x:\dir\subdir\Test\TestComponent.cshtml) - Html - \n\nWelcome to your new app.\n\n
+                HtmlElement - (67:6,0 [41] x:\dir\subdir\Test\TestComponent.cshtml) - surveyprompt
+                    HtmlAttribute -  -  - 
+                        HtmlAttributeValue -  - 
+                            IntermediateToken -  - Html - <div>Test!</div>