diff --git a/rest-api-spec/src/main/resources/rest-api-spec/test/cat.allocation/10_basic.yaml b/rest-api-spec/src/main/resources/rest-api-spec/test/cat.allocation/10_basic.yaml
index 5f0646139b5..bdb328fad79 100755
--- a/rest-api-spec/src/main/resources/rest-api-spec/test/cat.allocation/10_basic.yaml
+++ b/rest-api-spec/src/main/resources/rest-api-spec/test/cat.allocation/10_basic.yaml
@@ -54,7 +54,7 @@
             /^
               ( \s*                          #allow leading spaces to account for right-justified text
                 \d+                    \s+
-                \d+(\.\d+)?b           \s+
+                \d+(\.\d+)?[kmgt]?b    \s+
                 \d+(\.\d+)?[kmgt]?b    \s+
                 (\d+(\.\d+)?[kmgt]b   \s+)  #always should return value since we filter out non data nodes by default
                 (\d+(\.\d+)?[kmgt]b   \s+)  #always should return value since we filter out non data nodes by default
@@ -83,7 +83,7 @@
       $body: |
             /^
               ( 0                      \s+
-                0b                     \s+
+                \d+(\.\d+)?[kmgt]?b    \s+
                 \d+(\.\d+)?[kmgt]?b    \s+
                 (\d+(\.\d+)?[kmgt]b   \s+)?  #no value from client nodes
                 (\d+(\.\d+)?[kmgt]b   \s+)?  #no value from client nodes
@@ -117,7 +117,7 @@
              /^
                ( \s*                          #allow leading spaces to account for right-justified text
                  \d+                    \s+
-                 \d+(\.\d+)?b           \s+
+                 \d+(\.\d+)?[kmgt]?b    \s+
                  \d+(\.\d+)?[kmgt]?b    \s+
                  (\d+(\.\d+)?[kmgt]b   \s+)?  #no value from client nodes
                  (\d+(\.\d+)?[kmgt]b   \s+)?  #no value from client nodes