diff --git a/doc/source/schema/1.5.json b/doc/source/schema/1.5.json
index ba9b7b2b..ae636d2e 100644
--- a/doc/source/schema/1.5.json
+++ b/doc/source/schema/1.5.json
@@ -224,7 +224,7 @@
         },
         "required-since": {
           "type": "string",
-          "pattern": "[^$|^\\d{4}-\\d{2}-\\d{2}$]"
+          "pattern": "^(\\d{4}-\\d{2}-\\d{2})?$"
         },
         "tests": {
           "type": "object",
diff --git a/doc/source/schema/1.6.json b/doc/source/schema/1.6.json
index b23c01d1..d6d59e7f 100644
--- a/doc/source/schema/1.6.json
+++ b/doc/source/schema/1.6.json
@@ -223,7 +223,7 @@
         },
         "required-since": {
           "type": "string",
-          "pattern": "[^$|^\\d{4}-\\d{2}-\\d{2}$]"
+          "pattern": "^(\\d{4}-\\d{2}-\\d{2})?$"
         },
         "tests": {
           "type": "object",
diff --git a/tools/jsonToRst.py b/tools/jsonToRst.py
index 88328346..20f6230a 100755
--- a/tools/jsonToRst.py
+++ b/tools/jsonToRst.py
@@ -163,7 +163,7 @@ def write_components(data, out_file):
                 event=event.capitalize()))
             out_file.write("-" * (len(event) + 15) + "\n")
 
-            if(len(data['components'][component]['capabilities'][event]) == 0):
+            if len(data['components'][component]['capabilities'][event]) == 0:
                 out_file.write("None\n")
 
             for req in data['components'][component]['capabilities'][event]:
diff --git a/tools/jsonToRst_schema_1.py b/tools/jsonToRst_schema_1.py
index ec3bcb23..35c1ab31 100755
--- a/tools/jsonToRst_schema_1.py
+++ b/tools/jsonToRst_schema_1.py
@@ -168,7 +168,7 @@ def write_components(data, out_file):
                 event=event.capitalize()))
             out_file.write("-" * (len(event) + 15) + "\n")
 
-            if(len(data['components'][component][event]) == 0):
+            if (len(data['components'][component][event]) == 0):
                 out_file.write("None\n")
 
             for req in data['components'][component][event]: