diff --git a/CHANGELOG.md b/CHANGELOG.md
index 27465f59..9ea2c9ac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Change context menu now lists IPM packages from all Git-enabled namespaces, prefixed with the namespace name (#952)
 - Pull event handler option in settings page now displays user-friendly names for options (#908)
 - Validation that SSH key file path is not a directory when configuring Embedded Git (#943)
+- Customization of IPM load flags using `##class(SourceControl.Git.PullEventHandler.PackageManager).ConfigureLoadFlags(.flags)` (#974)
 
 ### Fixed
 - Changes to % routines mapped to the current namespace may now be added to source control and committed (#944)
diff --git a/cls/SourceControl/Git/PullEventHandler/PackageManager.cls b/cls/SourceControl/Git/PullEventHandler/PackageManager.cls
index 42c39f87..77a4a6f3 100644
--- a/cls/SourceControl/Git/PullEventHandler/PackageManager.cls
+++ b/cls/SourceControl/Git/PullEventHandler/PackageManager.cls
@@ -9,10 +9,27 @@ Parameter DESCRIPTION = "Does zpm ""load <repo root>""";
 Method OnPull() As %Status
 {
     set command = "load "_..LocalRoot
+    set additionalFlags = ..GetLoadFlags()
+    if (additionalFlags'="") set command = command _ " " _ additionalFlags
     quit $select(
         $$$comClassDefined("%IPM.Main"): ##class(%IPM.Main).Shell(command),
         1: ##class(%ZPM.PackageManager).Shell(command)
     )
 }
 
+/// Configures additional flags to be used with zpm "load" by Package Manager pull event handlers
+/// Example: to use `zpm "load -DNoMapping=1"` run the following:
+/// ```
+/// do ##class(SourceControl.Git.PullEventHandler.PackageManager).ConfigureLoadFlags("-DNoMapping=1")
+/// ```
+ClassMethod ConfigureLoadFlags(flags = "")
+{
+    set @##class(SourceControl.Git.Utils).#Storage@("settings","IPM","loadFlags") = flags
+}
+
+ClassMethod GetLoadFlags() As %String
+{
+    return $get(@##class(SourceControl.Git.Utils).#Storage@("settings","IPM","loadFlags"))
+}
+
 }
diff --git a/cls/SourceControl/Git/PullEventHandler/PackageManagerReload.cls b/cls/SourceControl/Git/PullEventHandler/PackageManagerReload.cls
index 87cb3f5d..29f480be 100644
--- a/cls/SourceControl/Git/PullEventHandler/PackageManagerReload.cls
+++ b/cls/SourceControl/Git/PullEventHandler/PackageManagerReload.cls
@@ -1,4 +1,4 @@
-Class SourceControl.Git.PullEventHandler.PackageManagerReload Extends SourceControl.Git.PullEventHandler
+Class SourceControl.Git.PullEventHandler.PackageManagerReload Extends SourceControl.Git.PullEventHandler.PackageManager
 {
 
 Parameter NAME = "Package Manager Reload";
@@ -20,11 +20,8 @@ Method OnPull() As %Status
         )
         $$$QuitOnError(sc)
     }
-    set command = "load "_..LocalRoot
-    quit $select(
-        $$$comClassDefined("%IPM.Main"): ##class(%IPM.Main).Shell(command),
-        1: ##class(%ZPM.PackageManager).Shell(command)
-    )
+    /// super class loads the IPM package
+    return ##super()
 }
 
 }
diff --git a/test/UnitTest/SourceControl/Git/PullEventHandler/PackageManagerReload.cls b/test/UnitTest/SourceControl/Git/PullEventHandler/PackageManagerReload.cls
new file mode 100644
index 00000000..e063e98b
--- /dev/null
+++ b/test/UnitTest/SourceControl/Git/PullEventHandler/PackageManagerReload.cls
@@ -0,0 +1,40 @@
+/// integration tests for the Package Manager Reload pull event handler
+Class UnitTest.SourceControl.Git.PullEventHandler.PackageManagerReload Extends UnitTest.SourceControl.Git.AbstractTest
+{
+
+Method TestLoadUninstallsThenInstalls()
+{
+    set testModulePath = ##class(SourceControl.Git.PackageManagerContext).ForInternalName("git-source-control.zpm").Package.Root_"test/_resources/simplest-module"
+    set pullEventHandler = ##class(SourceControl.Git.PullEventHandler.PackageManagerReload).%New()
+    set pullEventHandler.LocalRoot = testModulePath
+    // pull once to install simplest-module
+    do $$$AssertStatusOK(pullEventHandler.OnPull())
+    // pull again to verify uninstall + install
+    do $$$AssertStatusOK(pullEventHandler.OnPull())
+    set history = ##class(%IPM.General.History).GetHistory(,,2)
+    do $$$AssertTrue(history.%Next())
+    do $$$AssertEquals(history.Action,"load")
+    do $$$AssertTrue(history.%Next())
+    do $$$AssertEquals(history.Action,"uninstall")
+    do $$$AssertEquals(history.CommandString,"uninstall simplest-module")
+    zpm "uninstall simplest-module"
+}
+
+Method TestLoadUsesConfiguredFlags()
+{
+    set testModulePath = ##class(SourceControl.Git.PackageManagerContext).ForInternalName("git-source-control.zpm").Package.Root_"test/_resources/simplest-module"
+    set initFlags = $get(@##class(SourceControl.Git.Utils).#Storage@("settings","IPM","loadFlags"))
+    set flags = "-DNoMapping=1 -extra-pip-flags ""--timeout 30"""
+    do ##class(SourceControl.Git.PullEventHandler.PackageManagerReload).ConfigureLoadFlags(flags)
+    set pullEventHandler = ##class(SourceControl.Git.PullEventHandler.PackageManagerReload).%New()
+    set pullEventHandler.LocalRoot = testModulePath
+    do $$$AssertStatusOK(pullEventHandler.OnPull())
+    set history = ##class(%IPM.General.History).GetHistory(,,2)
+    do $$$AssertTrue(history.%Next())
+    do $$$AssertEquals(history.Action,"load")
+    do $$$AssertEquals(history.CommandString, "load "_testModulePath_" -DNoMapping=1 -extra-pip-flags ""--timeout 30""")
+    zpm "uninstall simplest-module"
+    do ##class(SourceControl.Git.PullEventHandler.PackageManagerReload).ConfigureLoadFlags(initFlags)
+}
+
+}
diff --git a/test/_resources/simplest-module/module.xml b/test/_resources/simplest-module/module.xml
new file mode 100644
index 00000000..6fbd0e42
--- /dev/null
+++ b/test/_resources/simplest-module/module.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Export generator="Cache" version="25">
+  <Document name="simplest-module.ZPM">
+    <Module>
+      <Name>simplest-module</Name>
+      <Version>1.0.0</Version>
+      <Packaging>module</Packaging>
+    </Module>
+  </Document>
+</Export>