diff --git a/sharedtestresources/src/main/elasticsearch-maven-plugin/5.0/configuration/jvm.options b/sharedtestresources/src/main/elasticsearch-maven-plugin/5.0/configuration/jvm.options
index 61cb6cc3198..704ff2712e8 100644
--- a/sharedtestresources/src/main/elasticsearch-maven-plugin/5.0/configuration/jvm.options
+++ b/sharedtestresources/src/main/elasticsearch-maven-plugin/5.0/configuration/jvm.options
@@ -19,8 +19,11 @@
 # Xms represents the initial size of total heap space
 # Xmx represents the maximum size of total heap space
 
--Xms2g
--Xmx2g
+# For Hibernate Search, we don't need as much as the default 2g
+# Let's keep it low, so that we'll be able to run tests
+# on memory-constrained CI slaves
+-Xms256m
+-Xmx256m
 
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 ## Expert settings