diff --git a/x-pack/platform/plugins/shared/cases/server/services/cases/utils.test.ts b/x-pack/platform/plugins/shared/cases/server/services/cases/utils.test.ts
index b95d5a72ad927..a9b946287d69c 100644
--- a/x-pack/platform/plugins/shared/cases/server/services/cases/utils.test.ts
+++ b/x-pack/platform/plugins/shared/cases/server/services/cases/utils.test.ts
@@ -228,7 +228,7 @@ const searchFieldQuery: estypes.QueryDslQueryContainer[] = [
     nested: {
       path: 'cases.observables',
       query: {
-        term: { 'cases.observables.value': search },
+        term: { 'cases.observables.value': { value: search, case_insensitive: true } },
       },
     },
   },
@@ -236,7 +236,7 @@ const searchFieldQuery: estypes.QueryDslQueryContainer[] = [
     nested: {
       path: 'cases.customFields',
       query: {
-        term: { 'cases.customFields.value': search },
+        term: { 'cases.customFields.value': { value: search, case_insensitive: true } },
       },
     },
   },
diff --git a/x-pack/platform/plugins/shared/cases/server/services/cases/utils.ts b/x-pack/platform/plugins/shared/cases/server/services/cases/utils.ts
index 745fe40729076..f6c101e3cda15 100644
--- a/x-pack/platform/plugins/shared/cases/server/services/cases/utils.ts
+++ b/x-pack/platform/plugins/shared/cases/server/services/cases/utils.ts
@@ -119,7 +119,7 @@ export const constructSearchQuery = ({
             nested: {
               path,
               query: {
-                term: { [field]: search },
+                term: { [field]: { value: search, case_insensitive: true } },
               },
             },
           });