diff --git a/.azure/default-build.yml b/.azure/default-build.yml
index 429bcc57..fbd85c70 100644
--- a/.azure/default-build.yml
+++ b/.azure/default-build.yml
@@ -62,7 +62,7 @@ jobs:
         condition: eq( variables['Agent.OS'], 'Linux' )
         displayName: Run tests
     - ${{ if eq(parameters.agentOs, 'Windows') }}:
-      - powershell: "& ./build.${{ parameters.configuration }}/bin/${{ parameters.configuration }}/signalrclienttests.exe ${{ parameters.gtestFlags }}"
+      - powershell: "ls ./build.${{ parameters.configuration }}/bin/${{ parameters.configuration }}; & ./build.${{ parameters.configuration }}/bin/${{ parameters.configuration }}/signalrclienttests.exe ${{ parameters.gtestFlags }}"
         condition: eq( variables['Agent.OS'], 'Windows_NT' )
         displayName: Run tests
 
diff --git a/CMakeSettings.json b/CMakeSettings.json
index 0347ab87..6b11c709 100644
--- a/CMakeSettings.json
+++ b/CMakeSettings.json
@@ -10,8 +10,7 @@
       "cmakeCommandArgs": "-DBUILD_SAMPLES=true -DUSE_CPPRESTSDK=true",
       "buildCommandArgs": "-v",
       "ctestCommandArgs": "",
-      "cmakeToolchain": "${projectDir}\\submodules\\vcpkg\\scripts\\buildsystems\\vcpkg.cmake",
-      "variables": []
+      "cmakeToolchain": "${projectDir}\\submodules\\vcpkg\\scripts\\buildsystems\\vcpkg.cmake"
     },
     {
       "name": "x64-Release",
@@ -23,8 +22,20 @@
       "buildCommandArgs": "-v",
       "ctestCommandArgs": "",
       "cmakeToolchain": "${projectDir}\\submodules\\vcpkg\\scripts\\buildsystems\\vcpkg.cmake",
-      "inheritEnvironments": [ "msvc_x64_x64" ],
-      "variables": []
+      "inheritEnvironments": [ "msvc_x64_x64" ]
+    },
+    {
+      "name": "x64-Release-AddressSanitizer",
+      "generator": "Ninja",
+      "configurationType": "RelWithDebInfo",
+      "buildRoot": "${projectDir}\\out\\build\\${name}",
+      "installRoot": "${projectDir}\\out\\install\\${name}",
+      "cmakeCommandArgs": "-DBUILD_SAMPLES=true -DUSE_CPPRESTSDK=false",
+      "buildCommandArgs": "-v",
+      "ctestCommandArgs": "",
+      "addressSanitizerEnabled": true,
+      "cmakeToolchain": "${projectDir}\\submodules\\vcpkg\\scripts\\buildsystems\\vcpkg.cmake",
+      "inheritEnvironments": [ "msvc_x64_x64" ]
     }
   ]
 }
\ No newline at end of file
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index ab528a21..0643f956 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -90,7 +90,8 @@ stages:
       agentOs: Windows
       jobName: Windows_Build_Test
       useCppRestSDK: false
-      cMakeRunArgs: '-A x64'
+      cMakeRunArgs: '-A x64 -DCMAKE_CXX_FLAGS="/fsanitize=address"'
+      configuration: 'RelWithDebInfo'
 
   - template: .azure/default-build.yml
     parameters:
diff --git a/src/signalrclient/logger.cpp b/src/signalrclient/logger.cpp
index e8a84420..158bfe92 100644
--- a/src/signalrclient/logger.cpp
+++ b/src/signalrclient/logger.cpp
@@ -50,7 +50,7 @@ namespace signalr
 
                 // add millisecond part
                 // 5 = 3 digits of millisecond precision + 'Z' + null character ending
-                snprintf(timeString + sizeof(timeString) - 5, 5, "%03dZ", (int)milliseconds.count());
+                snprintf(timeString + sizeof(timeString) - 2, 5, "%03dZ", (int)milliseconds.count());
 
                 std::stringstream os;
                 os << timeString;