diff --git a/CHANGELOG.md b/CHANGELOG.md
index 32d445c24..94549cf2a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -75,6 +75,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Fixed request schema for `PATCH /_plugins/_security/api/nodesdn` ([#731](https://github.com/opensearch-project/opensearch-api-specification/pull/731))
 - Fixed response schema for `GET /_plugins/_security/api/nodesdn/{cluster_name}` ([#731](https://github.com/opensearch-project/opensearch-api-specification/pull/731))
 - Fixed request body for `/_search/scroll/{scroll_id}` ([#732](https://github.com/opensearch-project/opensearch-api-specification/pull/732))
+- Fixed type in `_msearch/template` ([#735](https://github.com/opensearch-project/opensearch-api-specification/pull/735))
 
 ### Changed
 - Changed `tasks._common:TaskInfo` and `tasks._common:TaskGroup` to be composed of a `tasks._common:TaskInfoBase` ([#683](https://github.com/opensearch-project/opensearch-api-specification/pull/683))
diff --git a/spec/schemas/_core.msearch_template.yaml b/spec/schemas/_core.msearch_template.yaml
index f9e164e84..c87bbc3da 100644
--- a/spec/schemas/_core.msearch_template.yaml
+++ b/spec/schemas/_core.msearch_template.yaml
@@ -25,7 +25,9 @@ components:
             The value is the variable value.
           type: object
           additionalProperties:
-            type: object
+            oneOf:
+              - type: string
+              - type: object
         profile:
           description: When `true`, provides a profile for the query execution.
           type: boolean
diff --git a/tests/default/_core/msearch.yaml b/tests/default/_core/msearch/index.yaml
similarity index 61%
rename from tests/default/_core/msearch.yaml
rename to tests/default/_core/msearch/index.yaml
index 6cff72802..7cb893404 100644
--- a/tests/default/_core/msearch.yaml
+++ b/tests/default/_core/msearch/index.yaml
@@ -1,4 +1,4 @@
-$schema: ../../../json_schemas/test_story.schema.yaml
+$schema: ../../../../json_schemas/test_story.schema.yaml
 
 description: Test document multi-search.
 epilogues:
@@ -25,7 +25,9 @@ prologues:
 chapters:
   - synopsis: Run multiple search requests in single request (GET).
     path: /_msearch
-    method: GET
+    method: 
+      - GET
+      - POST
     request:
       content_type: application/x-ndjson
       payload:
@@ -52,34 +54,4 @@ chapters:
                 - _index: movies
                   _id: movie1
                 - _index: movies
-                  _id: movie2
-  - synopsis: Run multiple search requests in single request (POST).
-    path: /_msearch
-    method: POST
-    request:
-      content_type: application/x-ndjson
-      payload:
-        - {index: movies}
-        - {query: {match_all: {}}}
-        - {index: books}
-        - {query: {match_all: {}}}
-    response:
-      status: 200
-      payload:
-        responses:
-          - hits:
-              total:
-                value: 2
-                relation: eq
-              hits:
-                - _index: movies
-                  _id: movie1
-                - _index: movies
-                  _id: movie2
-          - hits:
-              total:
-                value: 1
-                relation: eq
-              hits:
-                - _index: books
-                  _id: book1
+                  _id: movie2
\ No newline at end of file
diff --git a/tests/default/_core/msearch/template.yaml b/tests/default/_core/msearch/template.yaml
new file mode 100644
index 000000000..f1246f644
--- /dev/null
+++ b/tests/default/_core/msearch/template.yaml
@@ -0,0 +1,35 @@
+$schema: ../../../../json_schemas/test_story.schema.yaml
+
+description: Test _msearch/template APIs.
+prologues:  
+  - path: /_bulk
+    method: POST
+    parameters:
+      refresh: true
+    request:
+      content_type: application/x-ndjson
+      payload:
+        - {create: {_index: books, _id: book1}}
+        - {author: Harper Lee, title: To Kill a Mockingbird, year: 1960}
+        - {create: {_index: books, _id: book2}}
+        - {author: Elizabeth Rudnick, title: Beauty and the Beast, year: 1991}
+        - {create: {_index: books, _id: book3}}
+        - {author: George Orwell, title: '1984', year: 1949}
+epilogues:
+  - path: /books
+    method: DELETE
+    status: [200, 404]
+
+chapters:
+  - synopsis: Perform a multi-search template query using a GET request.
+    path: /_msearch/template
+    method:
+      - GET
+      - POST
+    request:
+      content_type: application/x-ndjson
+      payload:
+        - {index: books}
+        - {source: '{"query": {"match": {"title": "{{title}}"}}}', params: {title: Mockingbird}}
+        - {index: books}
+        - {source: '{"query": {"match": {"title": "{{title}}"}}}', params: {title: Beast}}
\ No newline at end of file
diff --git a/tests/default/indices/msearch.yaml b/tests/default/indices/msearch/index.yaml
similarity index 87%
rename from tests/default/indices/msearch.yaml
rename to tests/default/indices/msearch/index.yaml
index ba5cd97eb..53fbb7122 100644
--- a/tests/default/indices/msearch.yaml
+++ b/tests/default/indices/msearch/index.yaml
@@ -1,4 +1,4 @@
-$schema: ../../../json_schemas/test_story.schema.yaml
+$schema: ../../../../json_schemas/test_story.schema.yaml
 
 description: Test endpoints relevant to the lifecycle of an index, including multi-get and multi-search operations.
 prologues:
@@ -22,7 +22,9 @@ epilogues:
 chapters:
   - synopsis: Perform a `_msearch` request to execute multiple search queries in a single call.
     path: /{index}/_msearch
-    method: POST
+    method:
+      - GET
+      - POST
     parameters:
       index: books
     request:
@@ -31,6 +33,4 @@ chapters:
         - {index: books}
         - {query: {match: {title: To Kill a Mockingbird}}}
         - {index: books}
-        - {query: {match: {title: The Cruise}}}
-    response:
-      status: 200
\ No newline at end of file
+        - {query: {match: {title: The Cruise}}}
\ No newline at end of file
diff --git a/tests/default/indices/msearch/template.yaml b/tests/default/indices/msearch/template.yaml
new file mode 100644
index 000000000..0586dc449
--- /dev/null
+++ b/tests/default/indices/msearch/template.yaml
@@ -0,0 +1,37 @@
+$schema: ../../../../json_schemas/test_story.schema.yaml
+
+description: Test _msearch/template APIs.
+prologues:  
+  - path: /_bulk
+    method: POST
+    parameters:
+      refresh: true
+    request:
+      content_type: application/x-ndjson
+      payload:
+        - {create: {_index: books, _id: book1}}
+        - {author: Harper Lee, title: To Kill a Mockingbird, year: 1960}
+        - {create: {_index: books, _id: book2}}
+        - {author: Elizabeth Rudnick, title: Beauty and the Beast, year: 1991}
+        - {create: {_index: books, _id: book3}}
+        - {author: George Orwell, title: '1984', year: 1949}
+epilogues:
+  - path: /books
+    method: DELETE
+    status: [200, 404]
+
+chapters:
+  - synopsis: Perform a multi-search template query using a GET request.
+    path: /{index}/_msearch/template
+    parameters:
+      index: books
+    method:
+      - GET
+      - POST
+    request:
+      content_type: application/x-ndjson
+      payload:
+        - {index: books}
+        - {source: '{"query": {"match": {"title": "{{title}}"}}}', params: {title: Mockingbird}}
+        - {index: books}
+        - {source: '{"query": {"match": {"title": "{{title}}"}}}', params: {title: Beast}}
\ No newline at end of file