diff --git a/src/Docfx.App/Config/ListWithStringFallback.cs b/src/Docfx.App/Config/ListWithStringFallback.cs
index 4ece161d789..208062d914a 100644
--- a/src/Docfx.App/Config/ListWithStringFallback.cs
+++ b/src/Docfx.App/Config/ListWithStringFallback.cs
@@ -12,7 +12,7 @@ internal class ListWithStringFallback : List<string>
     /// <summary>
     /// Initializes a new instance of the <see cref="ListWithStringFallback"/> class.
     /// </summary>
-    public ListWithStringFallback() : base()
+    public ListWithStringFallback()
     {
     }
 
diff --git a/src/Docfx.Build/FileMetadata.cs b/src/Docfx.Build/FileMetadata.cs
index 8314c0255b3..928e646fb08 100644
--- a/src/Docfx.Build/FileMetadata.cs
+++ b/src/Docfx.Build/FileMetadata.cs
@@ -11,7 +11,7 @@ public sealed class FileMetadata : Dictionary<string, ImmutableArray<FileMetadat
 {
     public string BaseDir { get; }
 
-    public FileMetadata(string baseDir) : base()
+    public FileMetadata(string baseDir)
     {
         BaseDir = baseDir;
     }
diff --git a/src/Docfx.Common/FileItems.cs b/src/Docfx.Common/FileItems.cs
index c0d470961f3..67094f25b76 100644
--- a/src/Docfx.Common/FileItems.cs
+++ b/src/Docfx.Common/FileItems.cs
@@ -6,7 +6,7 @@ namespace Docfx;
 public class FileItems : List<string>
 {
     private static readonly IEnumerable<string> Empty = new List<string>();
-    public FileItems(string file) : base()
+    public FileItems(string file)
     {
         Add(file);
     }
diff --git a/src/Docfx.Common/FileMapping.cs b/src/Docfx.Common/FileMapping.cs
index 35f761c26c0..90fdcfbe4a4 100644
--- a/src/Docfx.Common/FileMapping.cs
+++ b/src/Docfx.Common/FileMapping.cs
@@ -45,7 +45,8 @@ public IReadOnlyList<FileMappingItem> Items
     /// <summary>
     /// Initializes a new instance of the <see cref="FileMapping"/> class.
     /// </summary>
-    public FileMapping() : base() { }
+    public FileMapping()
+    { }
 
     /// <summary>
     /// Initializes a new instance of the <see cref="FileMapping"/> class.
diff --git a/src/Docfx.MarkdigEngine.Extensions/TripleColon/TripleColonInline.cs b/src/Docfx.MarkdigEngine.Extensions/TripleColon/TripleColonInline.cs
index a70e3ecca9f..844bebf8628 100644
--- a/src/Docfx.MarkdigEngine.Extensions/TripleColon/TripleColonInline.cs
+++ b/src/Docfx.MarkdigEngine.Extensions/TripleColon/TripleColonInline.cs
@@ -12,7 +12,7 @@ public class TripleColonInline : Inline, ITripleColon
     public string Body { get; set; }
 
     public TripleColonInline()
-        : base() { }
+    { }
 
     public bool Closed { get; set; }
 
diff --git a/test/Docfx.Build.Tests/PostProcessors/SitemapGeneratorTests.cs b/test/Docfx.Build.Tests/PostProcessors/SitemapGeneratorTests.cs
index 9192cdb5201..4e8658a653b 100644
--- a/test/Docfx.Build.Tests/PostProcessors/SitemapGeneratorTests.cs
+++ b/test/Docfx.Build.Tests/PostProcessors/SitemapGeneratorTests.cs
@@ -16,7 +16,6 @@ public class SitemapGeneratorTests : TestBase
     private readonly ITestOutputHelper _output;
 
     public SitemapGeneratorTests(ITestOutputHelper output)
-        : base()
     {
         _output = output;
     }
diff --git a/test/docfx.Tests/JsonConverterTest.cs b/test/docfx.Tests/JsonConverterTest.cs
index 1e54eb635b8..02d57690be6 100644
--- a/test/docfx.Tests/JsonConverterTest.cs
+++ b/test/docfx.Tests/JsonConverterTest.cs
@@ -102,7 +102,8 @@ public void TestFileMappingItemOutputShouldContainSrcOnly()
 
 internal class SkipEmptyOrNullContractResolver : DefaultContractResolver
 {
-    public SkipEmptyOrNullContractResolver(bool shareCache = false) : base() { }
+    public SkipEmptyOrNullContractResolver(bool shareCache = false)
+    { }
 
     protected override JsonProperty CreateProperty(MemberInfo member,
         MemberSerialization memberSerialization)