diff --git a/pkg/rules/rulespb/custom_test.go b/pkg/rules/rulespb/custom_test.go
index eacbd4df3c..836075f4df 100644
--- a/pkg/rules/rulespb/custom_test.go
+++ b/pkg/rules/rulespb/custom_test.go
@@ -57,6 +57,7 @@ func TestJSONUnmarshalMarshal(t *testing.T) {
 						Interval:                  2442,
 						LastEvaluation:            now,
 						EvaluationDurationSeconds: 2.1,
+						Limit:                     0,
 						PartialResponseStrategy:   storepb.PartialResponseStrategy_ABORT,
 						Rules:                     []*Rule{},
 					},
@@ -78,7 +79,7 @@ func TestJSONUnmarshalMarshal(t *testing.T) {
 				},
 			},
 			// Different than input due to default enum fields.
-			expectedJSONOutput: `{"groups":[{"name":"","file":"","rules":[],"interval":0,"evaluationTime":0,"lastEvaluation":"0001-01-01T00:00:00Z","partialResponseStrategy":"ABORT"}]}`,
+			expectedJSONOutput: `{"groups":[{"name":"","file":"","rules":[],"interval":0,"evaluationTime":0,"lastEvaluation":"0001-01-01T00:00:00Z","limit":0,"partialResponseStrategy":"ABORT"}]}`,
 		},
 		{
 			name: "one valid group, with 1 with no rule type",
@@ -230,7 +231,7 @@ func TestJSONUnmarshalMarshal(t *testing.T) {
 				},
 			},
 			// Different than input due to the alerts slice being initialized to a zero-length slice instead of nil.
-			expectedJSONOutput: `{"groups":[{"name":"group1","file":"file1.yml","rules":[{"state":"pending","name":"alert1","query":"up == 0","duration":60,"labels":{"a2":"b2","c2":"d2"},"annotations":{"ann1":"ann44","ann2":"ann33"},"alerts":[],"health":"health2","lastError":"1","evaluationTime":1.1,"lastEvaluation":"0001-01-01T00:00:00Z","type":"alerting"}],"interval":2442,"evaluationTime":2.1,"lastEvaluation":"0001-01-01T00:00:00Z","partialResponseStrategy":"ABORT"}]}`,
+			expectedJSONOutput: `{"groups":[{"name":"group1","file":"file1.yml","rules":[{"state":"pending","name":"alert1","query":"up == 0","duration":60,"labels":{"a2":"b2","c2":"d2"},"annotations":{"ann1":"ann44","ann2":"ann33"},"alerts":[],"health":"health2","lastError":"1","evaluationTime":1.1,"lastEvaluation":"0001-01-01T00:00:00Z","type":"alerting"}],"interval":2442,"evaluationTime":2.1,"lastEvaluation":"0001-01-01T00:00:00Z","limit":0,"partialResponseStrategy":"ABORT"}]}`,
 		},
 		{
 			name: "one valid group, with 1 rule and alert each and second empty group.",
diff --git a/pkg/testutil/testpromcompatibility/api_compatibility.go b/pkg/testutil/testpromcompatibility/api_compatibility.go
index ecf357f8bb..5dde3b53b0 100644
--- a/pkg/testutil/testpromcompatibility/api_compatibility.go
+++ b/pkg/testutil/testpromcompatibility/api_compatibility.go
@@ -24,6 +24,7 @@ type RuleGroup struct {
 	Interval       float64   `json:"interval"`
 	EvaluationTime float64   `json:"evaluationTime"`
 	LastEvaluation time.Time `json:"lastEvaluation"`
+	Limit          int       `json:"limit"`
 
 	PartialResponseStrategy string `json:"partialResponseStrategy"`
 }