diff --git a/modules/rostests/winetests/msi/action.c b/modules/rostests/winetests/msi/action.c
index 91cf3e121c4..980ed508901 100644
--- a/modules/rostests/winetests/msi/action.c
+++ b/modules/rostests/winetests/msi/action.c
@@ -1716,13 +1716,26 @@ static const char rmi_install_exec_seq_dat[] =
     "InstallFiles\t\t2000\n"
     "UnregisterExtensionInfo\t\t3000\n"
     "UnregisterMIMEInfo\t\t3500\n"
+    "umi_immediate\tREMOVE\t3501\n"
+    "umi_deferred\tREMOVE\t3502\n"
     "RegisterExtensionInfo\t\t4000\n"
     "RegisterMIMEInfo\t\t4500\n"
+    "rmi_immediate\tNOT REMOVE\t4501\n"
+    "rmi_deferred\tNOT REMOVE\t4502\n"
     "RegisterProduct\t\t5000\n"
     "PublishFeatures\t\t5100\n"
     "PublishProduct\t\t5200\n"
     "InstallFinalize\t\t6000\n";
 
+static const char rmi_custom_action_dat[] =
+    "Action\tType\tSource\tTarget\n"
+    "s72\ti2\tS64\tS0\n"
+    "CustomAction\tAction\n"
+    "rmi_immediate\t1\tcustom.dll\trmi_absent\n"
+    "rmi_deferred\t1025\tcustom.dll\trmi_present\n"
+    "umi_immediate\t1\tcustom.dll\trmi_present\n"
+    "umi_deferred\t1025\tcustom.dll\trmi_absent\n";
+
 static const char pa_file_dat[] =
     "File\tComponent_\tFileName\tFileSize\tVersion\tLanguage\tAttributes\tSequence\n"
     "s72\ts72\tl255\ti4\tS72\tS20\tI2\ti2\n"
@@ -2270,6 +2283,7 @@ static const msi_table rmi_tables[] =
     ADD_TABLE(rmi_verb),
     ADD_TABLE(rmi_mime),
     ADD_TABLE(rmi_install_exec_seq),
+    ADD_TABLE(rmi_custom_action),
     ADD_TABLE(media),
     ADD_TABLE(property)
 };
diff --git a/modules/rostests/winetests/msi/custom.c b/modules/rostests/winetests/msi/custom.c
index 306a8f3840f..b59b97a1dc7 100644
--- a/modules/rostests/winetests/msi/custom.c
+++ b/modules/rostests/winetests/msi/custom.c
@@ -1674,3 +1674,27 @@ todo_wine_if(!MsiGetMode(hinst, MSIRUNMODE_SCHEDULED)) {
 
     return ERROR_SUCCESS;
 }
+
+UINT WINAPI rmi_present(MSIHANDLE hinst)
+{
+    HKEY key;
+    LONG res;
+
+    res = RegOpenKeyA(HKEY_CLASSES_ROOT, "MIME\\Database\\Content Type\\mime/type", &key);
+todo_wine_if(!MsiGetMode(hinst, MSIRUNMODE_SCHEDULED))
+    ok(hinst, !res, "got %u\n", res);
+
+    return ERROR_SUCCESS;
+}
+
+UINT WINAPI rmi_absent(MSIHANDLE hinst)
+{
+    HKEY key;
+    LONG res;
+
+    res = RegOpenKeyA(HKEY_CLASSES_ROOT, "MIME\\Database\\Content Type\\mime/type", &key);
+todo_wine_if(!MsiGetMode(hinst, MSIRUNMODE_SCHEDULED))
+    ok(hinst, res == ERROR_FILE_NOT_FOUND, "got %u\n", res);
+
+    return ERROR_SUCCESS;
+}
diff --git a/modules/rostests/winetests/msi/custom.spec b/modules/rostests/winetests/msi/custom.spec
index b28b3931ff4..7f05f018073 100644
--- a/modules/rostests/winetests/msi/custom.spec
+++ b/modules/rostests/winetests/msi/custom.spec
@@ -29,6 +29,8 @@
 @ stdcall rci_absent(long)
 @ stdcall rei_present(long)
 @ stdcall rei_absent(long)
+@ stdcall rmi_present(long)
+@ stdcall rmi_absent(long)
 @ stdcall rd_present(long)
 @ stdcall rd_absent(long)
 @ stdcall sds_present(long)