diff --git a/tools/ci_build/github/azure-pipelines/templates/windows-build-tools-setup-steps.yml b/tools/ci_build/github/azure-pipelines/templates/windows-build-tools-setup-steps.yml
index b3f1255137..d149775a78 100644
--- a/tools/ci_build/github/azure-pipelines/templates/windows-build-tools-setup-steps.yml
+++ b/tools/ci_build/github/azure-pipelines/templates/windows-build-tools-setup-steps.yml
@@ -16,14 +16,14 @@ steps:
         feedsToUse: config
         nugetConfigPath: '$(Build.SourcesDirectory)\csharp\Nuget.CSharp.config'
         restoreDirectory: '$(Build.SourcesDirectory)\csharp'
-    #- task: UniversalPackages@0
-    #  displayName: 'Download python'
-    #  inputs:
-    #    command: download
-    #    vstsFeed: '$(System.TeamProject)'
-    #    vstsFeedPackage: 'miniconda3_win64'
-    #    vstsPackageVersion: '4.5.11'
-    #    downloadDirectory: '$(Build.BinariesDirectory)\python'
+    # - task: UniversalPackages@0
+    #   displayName: 'Download python'
+    #   inputs:
+    #     command: download
+    #     vstsFeed: '$(System.TeamProject)'
+    #     vstsFeedPackage: 'miniconda3_win64'
+    #     vstsPackageVersion: '4.5.11'
+    #     downloadDirectory: '$(Build.BinariesDirectory)\python'
 
     # Temporary bypass of artifacts permission issue
     - task: PowerShell@2
@@ -58,6 +58,26 @@ steps:
         filename: '$(Build.BinariesDirectory)\packages\python\python.exe'
         arguments: '$(Build.SourcesDirectory)\tools\ci_build\github\windows\download_cmake.py --build_dir $(Build.BinariesDirectory)'
     
+    - task: PowerShell@2
+      displayName: 'Download OpenCppCoverage installer'
+      continueOnError: true
+      inputs:
+        targetType: 'inline'
+        script: '
+          New-Item -Path "$(Build.BinariesDirectory)\installer" -ItemType "directory"
+
+          New-Item -Path "$(Build.BinariesDirectory)\installer\opencppcoverage" -ItemType "directory"
+
+          Invoke-WebRequest -OutFile $(Build.BinariesDirectory)\installer\opencppcoverage\installer.exe https://onnxruntimeinstaller.blob.core.windows.net/opencppcovergae-installer/OpenCppCoverageSetup-x64-0.9.7.0.exe
+          '
+
+    - task: CmdLine@1
+      continueOnError: true
+      displayName: 'Run OpenCPPCoverage installer'
+      inputs:
+        filename: '$(Build.BinariesDirectory)\installer\opencppcoverage\installer.exe'
+        arguments: '/SP- /VERYSILENT /SUPPRESSMSGBOXES /NORESTART /DIR="$(Build.BinariesDirectory)\OpenCppCoverage"'
+
     - task: BatchScript@1
       displayName: 'Setup VS2017 env vars'
       inputs:
diff --git a/tools/ci_build/github/azure-pipelines/templates/windows-code-coverage-steps.yml b/tools/ci_build/github/azure-pipelines/templates/windows-code-coverage-steps.yml
new file mode 100644
index 0000000000..66dd68cd06
--- /dev/null
+++ b/tools/ci_build/github/azure-pipelines/templates/windows-code-coverage-steps.yml
@@ -0,0 +1,20 @@
+# sets variables $(TestDataUrl) and $(TestDataChecksum)
+
+parameters:
+  OpenCppCoverageExe: '$(Build.BinariesDirectory)\OpenCppCoverage\OpenCppCoverage.exe'
+
+steps:
+
+- task: PowerShell@2
+  displayName: 'Run Test Coverage'
+  inputs:
+    filePath: '$(Build.SourcesDirectory)\tools\ci_build\github\windows\run_OpenCppCoverage.ps1'
+    arguments: '-OpenCppCoverageExe:"${{parameters.OpenCppCoverageExe}}" -SourceRoot:"$(Build.SourcesDirectory)" -BuildRoot:"$(Build.BinariesDirectory)" -LocalBuild:$false'
+  continueOnError: true  
+
+- task: PublishCodeCoverageResults@1
+  inputs:
+    codeCoverageTool: 'Cobertura'
+    summaryFileLocation: '$(Build.BinariesDirectory)/**/cobertura.xml'
+    reportDirectory: '$(Build.BinariesDirectory)/**/OpenCppCoverageResults'
+  continueOnError: true
diff --git a/tools/ci_build/github/azure-pipelines/win-ci-pipeline.yml b/tools/ci_build/github/azure-pipelines/win-ci-pipeline.yml
index 521184b484..682db714fb 100644
--- a/tools/ci_build/github/azure-pipelines/win-ci-pipeline.yml
+++ b/tools/ci_build/github/azure-pipelines/win-ci-pipeline.yml
@@ -2,6 +2,7 @@ jobs:
 - job: Windows_CI_Dev
   variables:
     buildDirectory: '$(Build.BinariesDirectory)'
+  timeoutInMinutes: 90
   steps:
     - template: templates/set-test-data-variables-step.yml
     - template: templates/windows-build-tools-setup-steps.yml
@@ -26,12 +27,18 @@ jobs:
         msbuildArchitecture: 'x64'
         logProjectEvents: true
         workingFolder: '$(Build.BinariesDirectory)\Debug'
+    
     - task: BatchScript@1
       displayName: 'Test Debug'
       inputs:
         filename: '$(Build.BinariesDirectory)\packages\python\python.exe'
         arguments: '$(Build.SourcesDirectory)\tools\ci_build\build.py --config Debug --build_dir $(Build.BinariesDirectory) --skip_submodule_sync --cmake_path $(Build.BinariesDirectory)\cmake\bin\cmake.exe --ctest_path $(Build.BinariesDirectory)\cmake\bin\ctest.exe --use_tvm --enable_pybind --use_mkldnn --use_mklml --use_openmp --build_shared_lib  --enable_onnx_tests --test_data_url $(TestDataUrl) --test_data_checksum $(TestDataChecksum) --gen_doc --test'
         workingFolder: '$(Build.BinariesDirectory)'
+    
+    - template: templates/windows-code-coverage-steps.yml
+      parameters:
+        OpenCppCoverageExe: '$(Build.BinariesDirectory)\OpenCppCoverage\OpenCppCoverage.exe'
+    
     - task: VSBuild@1
       displayName: 'Build C# Debug'
       inputs:
diff --git a/tools/ci_build/github/windows/run_OpenCppCoverage.ps1 b/tools/ci_build/github/windows/run_OpenCppCoverage.ps1
new file mode 100644
index 0000000000..bd7c3434df
--- /dev/null
+++ b/tools/ci_build/github/windows/run_OpenCppCoverage.ps1
@@ -0,0 +1,79 @@
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License.
+
+# Runs OpenCppCoverage for the Lotus unit tests and ONNX tests, and merges the coverage from all test runs.
+Param(
+    [Parameter(Mandatory=$true, HelpMessage="OpenCppCoverage exe.")][string]$OpenCppCoverageExe,
+    [Parameter(Mandatory=$true, HelpMessage="Lotus enlistment root.")][string]$SourceRoot,
+    [Parameter(Mandatory=$true, HelpMessage="Build root.")][string]$BuildRoot,
+    [Parameter(Mandatory=$false, HelpMessage="IsLocalBuild")][switch]$LocalBuild = $true
+)
+
+if (-not $LocalBuild) {
+# This is a hack to get the target path of the junctions in the build machine, lacking a neater way to do this.
+# Assumes that the junction is 2 level upper from the SourceRoot/BuildRoot
+# This is needed, because apparently the OpenCppCoverage cannot load the PDB symbol files from a junction 
+
+    $buildLeaf = Split-Path $BuildRoot -Leaf
+    $buildParent = Split-Path $BuildRoot -Parent
+    $buildParentLeaf = Split-Path $buildParent -Leaf
+    $buildParentParent = Split-Path $buildParent -Parent
+    $buildParentParentTarget = Get-Item $buildParentParent | Select-Object -ExpandProperty Target
+
+    $BuildRoot = Join-Path $buildParentParentTarget $buildParentLeaf
+    $BuildRoot = Join-Path $BuildRoot $buildLeaf
+}
+
+$coreSources = Join-Path $SourceRoot "onnxruntime\core"
+$headerSources = Join-Path $SourceRoot "include"
+$buildDir = Join-Path $BuildRoot "Debug\Debug" 
+
+function RunTest([string]$test_cmd, [string[]]$test_cmd_args, [string[]]$export_types, [string[]]$inputs)
+{
+    $cmd = "$OpenCppCoverageExe"
+    $cmdParams = @("--sources=$headerSources","--sources=$coreSources","--modules=$buildDir","--working_dir=$buildDir")
+
+    foreach($input in $inputs)
+    {
+        $inputPath = Join-Path $buildDir $input
+        $cmdParams += "--input_coverage=$inputPath"
+    }
+
+    foreach($export_type in $export_types)
+    {
+        $cmdParams += "--export_type=$export_type"
+    }
+
+    $cmdParams += @("--","$test_cmd")
+    $cmdParams += $test_cmd_args
+
+    & $cmd $cmdParams
+}
+
+# generate cobertura xml output and html report
+$outputXml = Join-Path $buildDir "cobertura.xml"
+$outputDir = Join-Path $buildDir "OpenCppCoverageResults"
+$modelDir = Join-Path $BuildRoot "models" 
+
+
+# ONNX test runner tests. 
+$onnx_test_runner = Join-Path $buildDir "onnx_test_runner.exe" 
+RunTest $onnx_test_runner ($modelDir) ("binary:"  + (Join-Path $buildDir "onnx_test_runner.cov"))
+
+
+# C-API/Shared-lib test
+$shared_lib_test = Join-Path $buildDir "onnxruntime_shared_lib_test.exe"
+RunTest $shared_lib_test @() ("binary:" + (Join-Path $buildDir "onnxruntime_shared_lib_test.cov"))
+
+
+# MLAS test
+$mlas_test = Join-Path $buildDir "onnxruntime_mlas_test.exe"
+RunTest $mlas_test @() ("binary:" + (Join-Path $buildDir "onnxruntime_mlas_test.cov"))
+
+# Lotus unit tests
+# need to copy the tvm.dll, since it is not in the buildDir path
+Copy-Item -Path $BuildRoot\Debug\external\tvm\Debug\tvm.dll -Destination $buildDir
+
+$onnxruntime_test_all = Join-Path $buildDir "onnxruntime_test_all.exe"
+RunTest $onnxruntime_test_all @() ("cobertura:$outputXml","html:$outputDir") ("onnxruntime_shared_lib_test.cov","onnx_test_runner.cov","onnxruntime_mlas_test.cov")
+