diff --git a/x-pack/plugin/eql/qa/common/src/main/java/org/elasticsearch/test/eql/BaseEqlSpecTestCase.java b/x-pack/plugin/eql/qa/common/src/main/java/org/elasticsearch/test/eql/BaseEqlSpecTestCase.java
index 90244d9b2c019..7455bb3f7c2e7 100644
--- a/x-pack/plugin/eql/qa/common/src/main/java/org/elasticsearch/test/eql/BaseEqlSpecTestCase.java
+++ b/x-pack/plugin/eql/qa/common/src/main/java/org/elasticsearch/test/eql/BaseEqlSpecTestCase.java
@@ -163,6 +163,9 @@ protected ObjectPath runQuery(String index, String query) throws Exception {
         if (maxSamplesPerKey > 0) {
             builder.field("max_samples_per_key", maxSamplesPerKey);
         }
+        if (randomBoolean()) {
+            builder.field("allow_partial_search_results", randomBoolean());
+        }
         builder.endObject();
 
         Request request = new Request("POST", "/" + index + "/_eql/search");
@@ -170,6 +173,9 @@ protected ObjectPath runQuery(String index, String query) throws Exception {
         if (ccsMinimizeRoundtrips != null) {
             request.addParameter("ccs_minimize_roundtrips", ccsMinimizeRoundtrips.toString());
         }
+        if (randomBoolean()) {
+            request.addParameter("allow_partial_search_results", String.valueOf(randomBoolean()));
+        }
         int timeout = Math.toIntExact(timeout().millis());
         RequestConfig config = RequestConfig.copy(RequestConfig.DEFAULT)
             .setConnectionRequestTimeout(timeout)
diff --git a/x-pack/plugin/eql/src/internalClusterTest/java/org/elasticsearch/xpack/eql/action/PartialSearchResultsIT.java b/x-pack/plugin/eql/src/internalClusterTest/java/org/elasticsearch/xpack/eql/action/PartialSearchResultsIT.java
index 3a573bf09b907..4008e9e87e729 100644
--- a/x-pack/plugin/eql/src/internalClusterTest/java/org/elasticsearch/xpack/eql/action/PartialSearchResultsIT.java
+++ b/x-pack/plugin/eql/src/internalClusterTest/java/org/elasticsearch/xpack/eql/action/PartialSearchResultsIT.java
@@ -205,7 +205,7 @@ public void testPartialResults() throws Exception {
         request = new EqlSearchRequest().indices("test-*").query("sequence [process where value == 0] [process where value == 2]");
         shouldFail(request);
 
-        // sequence query with missing event on unavailable shard. THIS IS A FALSE POSITIVE
+        // sequence query with missing event on unavailable shard.
         request = new EqlSearchRequest().indices("test-*")
             .query("sequence with maxspan=10s  [process where value == 1] ![process where value == 2] [process where value == 3]");
         shouldFail(request);