diff --git a/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/10_histogram.yml b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/10_histogram.yml
index 996c2aae8cfe4..a75b1d0eac793 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/10_histogram.yml
+++ b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/10_histogram.yml
@@ -678,6 +678,11 @@ setup:
           - '{"index": {}}'
           - '{"date": "2016-03-01"}'
 
+  - do:
+      indices.forcemerge:
+        index: test_2
+        max_num_segments: 1
+
   - do:
       search:
         index: test_2
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/230_composite.yml b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/230_composite.yml
index 78e2e6858c6ff..1964c17081471 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/230_composite.yml
+++ b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/230_composite.yml
@@ -1122,6 +1122,11 @@ setup:
                   }
                 ]
 
+  - do:
+      indices.forcemerge:
+        index: test_2
+        max_num_segments: 1
+
   - match: { hits.total.value: 4 }
   - length: { aggregations.test.buckets: 4 }
   - match: { profile.shards.0.aggregations.0.debug.optimized_segments: 1 }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/330_auto_date_histogram.yml b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/330_auto_date_histogram.yml
index fc82517788c91..899e761778fd9 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/330_auto_date_histogram.yml
+++ b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/330_auto_date_histogram.yml
@@ -145,6 +145,11 @@ setup:
                 field: date
                 buckets: 2
 
+  - do:
+      indices.forcemerge:
+        index: test_profile
+        max_num_segments: 1
+
   - match: { hits.total.value: 4 }
   - length: { aggregations.histo.buckets: 2 }
   - match: { profile.shards.0.aggregations.0.type: AutoDateHistogramAggregator.FromSingle }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/40_range.yml b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/40_range.yml
index 33deda336912a..80aad96ce1f6b 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/40_range.yml
+++ b/rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/40_range.yml
@@ -568,6 +568,11 @@ setup:
           - '{"index": {}}'
           - '{"double" : 50}'
 
+  - do:
+      indices.forcemerge:
+        index: test_profile
+        max_num_segments: 1
+
   - do:
       search:
         index: test_profile