diff --git a/rest-api-spec/src/main/resources/rest-api-spec/test/cat.nodes/10_basic.yaml b/rest-api-spec/src/main/resources/rest-api-spec/test/cat.nodes/10_basic.yaml
index 5b2ddb7fc38..12545f0a64b 100755
--- a/rest-api-spec/src/main/resources/rest-api-spec/test/cat.nodes/10_basic.yaml
+++ b/rest-api-spec/src/main/resources/rest-api-spec/test/cat.nodes/10_basic.yaml
@@ -8,7 +8,7 @@
   - match:
       $body: |
                /  #host       ip                          heap.percent        ram.percent      load                node.role        master          name
-               ^  (\S+   \s+  (\d{1,3}\.){3}\d{1,3}  \s+  \d+            \s+  \d*         \s+  \d*(\.\d+)?    \s+  [-dc]       \s+  [-*mx]    \s+   (\S+\s?)+   \s+  \n)+  $/
+               ^  (\S+   \s+  (\d{1,3}\.){3}\d{1,3}  \s+  \d+            \s+  \d*         \s+  (-)?\d*(\.\d+)?    \s+  [-dc]       \s+  [-*mx]    \s+   (\S+\s?)+   \s+  \n)+  $/
 
   - do:
       cat.nodes:
@@ -17,7 +17,7 @@
   - match:
       $body: |
                /^  host  \s+  ip                     \s+  heap\.percent   \s+  ram\.percent \s+  load           \s+  node\.role   \s+  master   \s+   name        \s+  \n
-                  (\S+   \s+  (\d{1,3}\.){3}\d{1,3}  \s+  \d+             \s+  \d*          \s+  \d*(\.\d+)?    \s+  [-dc]        \s+  [-*mx]    \s+   (\S+\s?)+   \s+  \n)+  $/
+                  (\S+   \s+  (\d{1,3}\.){3}\d{1,3}  \s+  \d+             \s+  \d*          \s+  (-)?\d*(\.\d+)?    \s+  [-dc]        \s+  [-*mx]    \s+   (\S+\s?)+   \s+  \n)+  $/
 
   - do:
       cat.nodes: