diff --git a/lib/core/tools/Test-IcingaFunction.psm1 b/lib/core/tools/Test-IcingaFunction.psm1
new file mode 100644
index 0000000..9de4777
--- /dev/null
+++ b/lib/core/tools/Test-IcingaFunction.psm1
@@ -0,0 +1,16 @@
+function Test-IcingaFunction()
+{
+    param(
+        [string]$Name
+    );
+
+    if ([string]::IsNullOrEmpty($Name)) {
+        return $FALSE;
+    }
+
+    if (Get-Command $Name -ErrorAction SilentlyContinue) {
+        return $TRUE;
+    }
+
+    return $FALSE;
+}