diff --git a/test/test-root-cause-filter.cpp b/test/test-root-cause-filter.cpp
new file mode 100644
index 0000000..a870d8f
--- /dev/null
+++ b/test/test-root-cause-filter.cpp
@@ -0,0 +1,61 @@
+#include <stdio.h>
+
+#include <analyzer/analyzer_main.hpp>
+#include <analyzer/plugins/plugin.hpp>
+#include <analyzer/ras-data/ras-data-parser.hpp>
+#include <hei_util.hpp>
+#include <util/pdbg.hpp>
+#include <util/trace.hpp>
+
+#include "gtest/gtest.h"
+
+namespace analyzer
+{
+// Forward reference of filterRootCause
+bool filterRootCause(AnalysisType i_type,
+                     const libhei::IsolationData& i_isoData,
+                     libhei::Signature& o_rootCause,
+                     const RasDataParser& i_rasData);
+} // namespace analyzer
+
+using namespace analyzer;
+
+static const auto eqCoreFir = static_cast<libhei::NodeId_t>(
+    libhei::hash<libhei::NodeId_t>("EQ_CORE_FIR"));
+
+static const auto rdfFir =
+    static_cast<libhei::NodeId_t>(libhei::hash<libhei::NodeId_t>("RDFFIR"));
+
+TEST(RootCauseFilter, Filter1)
+{
+    pdbg_targets_init(nullptr);
+
+    // Checkstop signature on the proc
+    auto proc0 = util::pdbg::getTrgt("/proc0");
+    libhei::Chip procChip0{proc0, P10_20};
+
+    // EQ_CORE_FIR[14]: ME = 0 checkstop
+    libhei::Signature checkstopSig{procChip0, eqCoreFir, 0, 14,
+                                   libhei::ATTN_TYPE_CHECKSTOP};
+
+    // Root cause signature on the ocmb
+    auto ocmb0 =
+        util::pdbg::getTrgt("proc0/pib/perv12/mc0/mi0/mcc0/omi0/ocmb0");
+    libhei::Chip ocmbChip0{ocmb0, EXPLORER_20};
+
+    // RDFFIR[14]: Mainline read UE
+    libhei::Signature ueSig{ocmbChip0, rdfFir, 0, 14,
+                            libhei::ATTN_TYPE_RECOVERABLE};
+
+    // Add the signatures to the isolation data
+    libhei::IsolationData isoData{};
+    isoData.addSignature(checkstopSig);
+    isoData.addSignature(ueSig);
+
+    RasDataParser rasData{};
+    libhei::Signature rootCause;
+    bool attnFound = filterRootCause(AnalysisType::SYSTEM_CHECKSTOP, isoData,
+                                     rootCause, rasData);
+    EXPECT_TRUE(attnFound);
+    EXPECT_EQ(ueSig.toUint32(), rootCause.toUint32());
+}