diff --git a/projects/dataclasses/private/test/InteractionRecord_TEST.cxx b/projects/dataclasses/private/test/InteractionRecord_TEST.cxx
index 0009a27e..be7a29c9 100644
--- a/projects/dataclasses/private/test/InteractionRecord_TEST.cxx
+++ b/projects/dataclasses/private/test/InteractionRecord_TEST.cxx
@@ -46,6 +46,11 @@ TEST(Comparison, Comparison_equal)
     B.signature.secondary_types.push_back(Particle::ParticleType::EMinus);
     EXPECT_TRUE(A == B);
 
+    A.primary_id = ParticleID(1, 1);
+    EXPECT_FALSE(A == B);
+    B.primary_id = ParticleID(1, 1);
+    EXPECT_TRUE(A == B);
+
     A.primary_initial_position = {1.0, 2.0, 3.0};
     EXPECT_FALSE(A == B);
     B.primary_initial_position = {1.0, 2.0, 3.0};
@@ -144,6 +149,14 @@ TEST(Comparison, LessThan)
     EXPECT_FALSE(A < B);
     EXPECT_FALSE(B < A);
 
+    A.primary_id = ParticleID(1, 1);
+    EXPECT_FALSE(A < B);
+    EXPECT_TRUE(B < A);
+
+    B.primary_id = ParticleID(1, 1);
+    EXPECT_FALSE(A < B);
+    EXPECT_FALSE(B < A);
+
     A.primary_initial_position = {1.0, 2.0, 3.0};
     EXPECT_FALSE(A < B);
     EXPECT_TRUE(B < A);
@@ -255,6 +268,8 @@ TEST(Serialization, Save)
     record.signature.primary_type = Particle::ParticleType::EMinus;
     record.signature.target_type = Particle::ParticleType::PPlus;
     record.signature.secondary_types.push_back(Particle::ParticleType::EMinus);
+    record.primary_id = ParticleID(1, 1);
+    record.primary_initial_position = {1.0, 2.0, 3.0};
     record.primary_mass = 1.0;
     record.primary_momentum = {1.0, 2.0, 3.0, 4.0};
     record.primary_helicity = 1.0;
@@ -274,7 +289,77 @@ TEST(Serialization, Save)
         oarchive(record);
     }
 
-    std::string expected = "{\n    \"cereal_class_version\": 0,\n    \"InteractionSignature\": {\n        \"cereal_class_version\": 0,\n        \"PrimaryType\": -11,\n        \"TargetType\": 2212,\n        \"SecondaryTypes\": [\n            -11\n        ]\n    },\n    \"PrimaryInitialPosition\": [\n        1,\n        2,\n        3\n    ],\n    \"PrimaryMass\": 1,\n    \"PrimaryMomentum\": [\n        1,\n        2,\n        3,\n        4\n    ],\n    \"PrimaryHelicity\": 1,\n    \"TargetMass\": 1,\n    \"TargetMomentum\": [\n        1,\n        2,\n        3,\n        4\n    ],\n    \"TargetHelicity\": 1,\n    \"InteractionVertex\": [\n        1,\n        2,\n        3\n    ],\n    \"SecondaryMasses\": [\n        1\n    ],\n    \"SecondaryMomenta\": [\n        [\n            1,\n            2,\n            3,\n            4\n        ]\n    ],\n    \"SecondaryHelicity\": [\n        1\n    ],\n    \"InteractionParameters\": {\n        \"test\": 1\n    }\n}";
+    std::string expected = "{\n\
+    \"value0\": {\n\
+        \"cereal_class_version\": 0,\n\
+        \"InteractionSignature\": {\n\
+            \"cereal_class_version\": 0,\n\
+            \"PrimaryType\": 11,\n\
+            \"TargetType\": 2212,\n\
+            \"SecondaryTypes\": [\n\
+                11\n\
+            ]\n\
+        },\n\
+        \"PrimaryID\": {\n\
+            \"cereal_class_version\": 0,\n\
+            \"MajorID\": 1,\n\
+            \"MinorID\": 1\n\
+        },\n\
+        \"PrimaryInitialPosition\": [\n\
+            1.0,\n\
+            2.0,\n\
+            3.0\n\
+        ],\n\
+        \"PrimaryMass\": 1.0,\n\
+        \"PrimaryMomentum\": [\n\
+            1.0,\n\
+            2.0,\n\
+            3.0,\n\
+            4.0\n\
+        ],\n\
+        \"PrimaryHelicity\": 1.0,\n\
+        \"TargetID\": {\n\
+            \"MajorID\": 0,\n\
+            \"MinorID\": 0\n\
+        },\n\
+        \"TargetMass\": 1.0,\n\
+        \"TargetMomentum\": [\n\
+            1.0,\n\
+            2.0,\n\
+            3.0,\n\
+            4.0\n\
+        ],\n\
+        \"TargetHelicity\": 1.0,\n\
+        \"InteractionVertex\": [\n\
+            1.0,\n\
+            2.0,\n\
+            3.0\n\
+        ],\n\
+        \"SecondaryIDs\": [],\n\
+        \"SecondaryMasses\": [\n\
+            1.0\n\
+        ],\n\
+        \"SecondaryMomenta\": [\n\
+            [\n\
+                1.0,\n\
+                2.0,\n\
+                3.0,\n\
+                4.0\n\
+            ]\n\
+        ],\n\
+        \"SecondaryHelicity\": [\n\
+            1.0\n\
+        ],\n\
+        \"InteractionParameters\": [\n\
+            {\n\
+                \"key\": \"test\",\n\
+                \"value\": 1.0\n\
+            }\n\
+        ]\n\
+    }\n\
+}";
+
+    EXPECT_EQ(ss.str(), expected);
 }
 
 int main(int argc, char** argv)