diff --git a/Flow.Launcher.Test/Flow.Launcher.Test.csproj b/Flow.Launcher.Test/Flow.Launcher.Test.csproj
index 2dbf1a9d3..e5ca36289 100644
--- a/Flow.Launcher.Test/Flow.Launcher.Test.csproj
+++ b/Flow.Launcher.Test/Flow.Launcher.Test.csproj
@@ -39,6 +39,7 @@
   </ItemGroup>
   
   <ItemGroup>
+    <ProjectReference Include="..\Plugins\Flow.Launcher.Plugin.Explorer\Flow.Launcher.Plugin.Explorer.csproj" />
     <ProjectReference Include="..\Plugins\Flow.Launcher.Plugin.Program\Flow.Launcher.Plugin.Program.csproj" />
     <ProjectReference Include="..\Plugins\Flow.Launcher.Plugin.Url\Flow.Launcher.Plugin.Url.csproj" />
     <ProjectReference Include="..\Flow.Launcher.Core\Flow.Launcher.Core.csproj" />
diff --git a/Flow.Launcher.Test/Plugins/ExplorerTest.cs b/Flow.Launcher.Test/Plugins/ExplorerTest.cs
index 2bc95d086..c0fa32f5b 100644
--- a/Flow.Launcher.Test/Plugins/ExplorerTest.cs
+++ b/Flow.Launcher.Test/Plugins/ExplorerTest.cs
@@ -1,11 +1,28 @@
+using Flow.Launcher.Plugin.Explorer;
+using Flow.Launcher.Plugin.Explorer.Search.WindowsIndex;
 using NUnit.Framework;
+using System;
 
 namespace Flow.Launcher.Test.Plugins
 {
     [TestFixture]
     public class ExplorerTest
     {
-        public void GivenWindowsIndexSearch_WhenProvidedFolderPath_ThenQueryWhereRestrictionsShouldUseDirectoryString(string expectedString){}
+        [TestCase("directory='file:{path}'")]
+        public void GivenWindowsIndexSearch_WhenProvidedFolderPath_ThenQueryWhereRestrictionsShouldUseDirectoryString(string expectedString)
+        {
+            // Given
+            var queryConstructor = new QueryConstructor(new Settings());
+
+            // When
+            var path = @"C:\Dropbox";
+            var result = queryConstructor.QueryWhereRestrictionsForTopLevelDirectorySearch(path);
+
+            // Then
+            Assert.IsTrue(result == expectedString,
+                $"Expected QueryWhereRestrictions string: {expectedString}{Environment.NewLine} " +
+                $"Actual: {result}{Environment.NewLine}");
+        }
 
         public void GivenWindowsIndexSearch_WhenSearchAllFoldersAndFiles_ThenQueryWhereRestrictionsShouldUseScopeString() { }
 
diff --git a/Plugins/Flow.Launcher.Plugin.Explorer/Search/WindowsIndex/QueryConstructor.cs b/Plugins/Flow.Launcher.Plugin.Explorer/Search/WindowsIndex/QueryConstructor.cs
new file mode 100644
index 000000000..9d5ffdb30
--- /dev/null
+++ b/Plugins/Flow.Launcher.Plugin.Explorer/Search/WindowsIndex/QueryConstructor.cs
@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Flow.Launcher.Plugin.Explorer.Search.WindowsIndex
+{
+    public class QueryConstructor
+    {
+        private Settings _settings;
+
+        public QueryConstructor(Settings settings)
+        {
+            _settings = settings;
+        }
+
+        ///<summary>
+        /// Search will be performed on all folders and files on the first level of a specified directory.
+        ///</summary>
+        public string QueryWhereRestrictionsForTopLevelDirectorySearch(string path)
+        {
+            // Set query restriction for top level directory search
+            return $"directory='file:{path}'";
+        }
+
+    }
+}
diff --git a/Plugins/Flow.Launcher.Plugin.Explorer/Settings.cs b/Plugins/Flow.Launcher.Plugin.Explorer/Settings.cs
index dcdb8f06e..2d664c3db 100644
--- a/Plugins/Flow.Launcher.Plugin.Explorer/Settings.cs
+++ b/Plugins/Flow.Launcher.Plugin.Explorer/Settings.cs
@@ -6,5 +6,6 @@ namespace Flow.Launcher.Plugin.Explorer
 {
     public class Settings
     {
+        public int MaxResult { get; set; } = 100; 
     }
 }