diff --git a/README.md b/README.md
index c6aebb4..d23be39 100644
--- a/README.md
+++ b/README.md
@@ -286,6 +286,8 @@ ___
 
 Returns all emoji belonging to a group, ordered by `order`.
 
+Non-numbers throw an error.
+
 **Parameters:**
 
 Name | Type | Description |
@@ -302,6 +304,8 @@ ___
 
 Returns all emoji matching the given search query, ordered by `order`.
 
+Empty/null strings throw an error.
+
 **Parameters:**
 
 Name | Type | Description |
@@ -318,6 +322,10 @@ ___
 
 Return a single emoji matching the shortcode, or null if not found.
 
+The colons around the shortcode should not be included when querying, e.g.
+use "slight_smile", not ":slight_smile:". Uppercase versus lowercase
+does not matter. Empty/null strings throw an error.
+
 **Parameters:**
 
 Name | Type | Description |
@@ -334,6 +342,8 @@ ___
 
 Return a single emoji matching the unicode string, or null if not found.
 
+Empty/null strings throw an error.
+
 **Parameters:**
 
 Name | Type | Description |
diff --git a/rollup.config.js b/rollup.config.js
index 95220a6..48b810c 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -44,7 +44,7 @@ const entryPoints = [
     output: './picker.js'
   },
   {
-    input: './src/database/Database.test.js',
+    input: './src/database/Database.js',
     output: './database.js'
   }
 ]