diff --git a/test/openpower-pels/src_test.cpp b/test/openpower-pels/src_test.cpp
index 11b15d4..97d9b27 100644
--- a/test/openpower-pels/src_test.cpp
+++ b/test/openpower-pels/src_test.cpp
@@ -1446,3 +1446,31 @@
         EXPECT_EQ(0x00080655, hexwords[0]);
     }
 }
+
+// Test SRC with additional data - PEL_SUBSYSTEM
+TEST_F(SRCTest, TestPELSubsystem)
+{
+    message::Entry entry;
+    entry.src.type = 0xBD;
+    entry.src.reasonCode = 0xABCD;
+    entry.subsystem = 0x42;
+    entry.src.powerFault = true;
+
+    // Values for the SRC words pointed to above
+    std::vector<std::string> adData{"PEL_SUBSYSTEM=0x20"};
+    AdditionalData ad{adData};
+    NiceMock<MockDataInterface> dataIface;
+
+    EXPECT_CALL(dataIface, getMotherboardCCIN).WillOnce(Return("ABCD"));
+
+    std::vector<std::string> dumpType{"bmc/entry", "resource/entry",
+                                      "system/entry"};
+    EXPECT_CALL(dataIface, checkDumpStatus(dumpType))
+        .WillOnce(Return(std::vector<bool>{false, false, false}));
+
+    SRC src{entry, ad, dataIface};
+
+    EXPECT_TRUE(src.valid());
+
+    EXPECT_EQ(src.asciiString(), "BD20ABCD                        ");
+}
diff --git a/test/openpower-pels/user_header_test.cpp b/test/openpower-pels/user_header_test.cpp
index a4bc3cb..59199fb 100644
--- a/test/openpower-pels/user_header_test.cpp
+++ b/test/openpower-pels/user_header_test.cpp
@@ -308,3 +308,24 @@
     EXPECT_EQ(uh.severity(), 0x20);
     EXPECT_EQ(uh.actionFlags(), 0xF000);
 }
+
+// Test that the PEL Subsystem omes from the event log if any
+TEST(UserHeaderTest, UseEventLogPELSubsystem)
+{
+    using namespace openpower::pels::message;
+    Entry regEntry;
+
+    regEntry.name = "test";
+    regEntry.subsystem = 5;
+    regEntry.actionFlags = 0xC000;
+    regEntry.eventType = 1;
+    regEntry.eventScope = 2;
+
+    MockDataInterface dataIface;
+    std::vector<std::string> adData{"PEL_SUBSYSTEM=0x25"};
+    AdditionalData ad{adData};
+
+    UserHeader uh(regEntry, phosphor::logging::Entry::Level::Critical, ad,
+                  dataIface);
+    ASSERT_EQ(uh.subsystem(), 0x25);
+}