diff --git a/TestCases/compliance-level-3/0058-feel-number-function/0058-feel-number-function-test-01.xml b/TestCases/compliance-level-3/0058-feel-number-function/0058-feel-number-function-test-01.xml
index 37189904e..f0d02fa55 100644
--- a/TestCases/compliance-level-3/0058-feel-number-function/0058-feel-number-function-test-01.xml
+++ b/TestCases/compliance-level-3/0058-feel-number-function/0058-feel-number-function-test-01.xml
@@ -173,4 +173,52 @@
+
+ Assert on a valid string parameter
+
+
+ 1234
+
+
+
+
+ Assert on a valid string with trailing zeros
+
+
+ 123
+
+
+
+
+ Assert on a valid integer number
+
+
+ 11.11
+
+
+
+
+ Assert on an invalid string parameter
+
+
+
+
+
+
+
+ Assert on an invalid string parameter
+
+
+
+
+
+
+
+ Assert on passing a null value
+
+
+
+
+
+
diff --git a/TestCases/compliance-level-3/0058-feel-number-function/0058-feel-number-function.dmn b/TestCases/compliance-level-3/0058-feel-number-function/0058-feel-number-function.dmn
index f0b49851a..89ff19b5a 100644
--- a/TestCases/compliance-level-3/0058-feel-number-function/0058-feel-number-function.dmn
+++ b/TestCases/compliance-level-3/0058-feel-number-function/0058-feel-number-function.dmn
@@ -190,5 +190,59 @@
number("1.000.000,01", ".", ",", ",")
+
+ Tests FEEL expression: 'number("1234"))' and expects result: '1234 (number)'
+ Result of FEEL expression 'number("1234"))'?
+ 1234 (number)
+
+
+ number("1234")
+
+
+
+ Tests FEEL expression: 'number("00123"))' and expects result: '123 (number)'
+ Result of FEEL expression 'number("00123"))'?
+ 123 (number)
+
+
+ number("00123")
+
+
+
+ Tests FEEL expression: 'number(11.11))' and expects result: '11.11 (number)'
+ Result of FEEL expression 'number(11.11))'?
+ 11.11 (number)
+
+
+ number(11.11)
+
+
+
+ Tests FEEL expression: 'number("test"))' and expects result: 'null'
+ Result of FEEL expression 'number("test"))'?
+ null
+
+
+ number("test")
+
+
+
+ Tests FEEL expression: 'number("1 2 3"))' and expects result: 'null'
+ Result of FEEL expression 'number("1 2 3"))'?
+ null
+
+
+ number("1 2 3")
+
+
+
+ Tests FEEL expression: 'number(null))' and expects result: 'null'
+ Result of FEEL expression 'number(null))'?
+ null
+
+
+ number(null)
+
+