diff --git a/src/library/mod.rs b/src/library/mod.rs
index b33ec7116..7e9689941 100644
--- a/src/library/mod.rs
+++ b/src/library/mod.rs
@@ -44,13 +44,13 @@ pub fn new() -> Scope {
 
     // Functions.
     set!(func: "align", align);
-    set!(func: "box", box_);
     set!(func: "font", font);
     set!(func: "h", h);
     set!(func: "image", image);
     set!(func: "pad", pad);
     set!(func: "page", page);
     set!(func: "pagebreak", pagebreak);
+    set!(func: "rect", rect);
     set!(func: "repr", repr);
     set!(func: "rgb", rgb);
     set!(func: "type", type_);
diff --git a/src/library/shapes.rs b/src/library/shapes.rs
index 254a22852..41be3b2b2 100644
--- a/src/library/shapes.rs
+++ b/src/library/shapes.rs
@@ -1,16 +1,16 @@
 use super::*;
 
-/// `box`: Create a rectangular box.
+/// `rect`: Create a rectangular box.
 ///
 /// # Positional arguments
 /// - Body: optional, of type `template`.
 ///
 /// # Named arguments
-/// - Width of the box:            `width`, of type `linear` relative to parent width.
-/// - Height of the box:           `height`, of type `linear` relative to parent height.
-/// - Main layouting direction:    `main-dir`, of type `direction`.
-/// - Cross layouting direction:   `cross-dir`, of type `direction`.
-/// - Background color of the box: `color`, of type `color`.
+/// - Width of the box:          `width`, of type `linear` relative to parent width.
+/// - Height of the box:         `height`, of type `linear` relative to parent height.
+/// - Main layouting direction:  `main-dir`, of type `direction`.
+/// - Cross layouting direction: `cross-dir`, of type `direction`.
+/// - Fill color of the box:     `fill`, of type `color`.
 ///
 /// # Relevant types and constants
 /// - Type `direction`
@@ -18,12 +18,12 @@ use super::*;
 ///     - `rtl` (right to left)
 ///     - `ttb` (top to bottom)
 ///     - `btt` (bottom to top)
-pub fn box_(ctx: &mut EvalContext, args: &mut ValueArgs) -> Value {
+pub fn rect(ctx: &mut EvalContext, args: &mut ValueArgs) -> Value {
     let width = args.get(ctx, "width");
     let height = args.get(ctx, "height");
     let main = args.get(ctx, "main-dir");
     let cross = args.get(ctx, "cross-dir");
-    let color = args.get(ctx, "color");
+    let fill = args.get(ctx, "fill");
     let body = args.find::<ValueTemplate>(ctx).unwrap_or_default();
 
     Value::template("box", move |ctx| {
@@ -33,7 +33,7 @@ pub fn box_(ctx: &mut EvalContext, args: &mut ValueArgs) -> Value {
 
         let child = ctx.exec(&body).into();
         let fixed = NodeFixed { width, height, child };
-        if let Some(color) = color {
+        if let Some(color) = fill {
             ctx.push(NodeBackground {
                 fill: Fill::Color(color),
                 child: fixed.into(),
diff --git a/tests/ref/repr.png b/tests/ref/repr.png
index 21d7af278..2f5697fd5 100644
Binary files a/tests/ref/repr.png and b/tests/ref/repr.png differ
diff --git a/tests/typ/control/let.typ b/tests/typ/control/let.typ
index 7752ec901..dd971ee5e 100644
--- a/tests/typ/control/let.typ
+++ b/tests/typ/control/let.typ
@@ -18,8 +18,8 @@
 ---
 // Syntax sugar for function definitions.
 #let background = #239dad
-#let box(body) = box(width: 2cm, height: 1cm, color: background, body)
-#box[Hi!]
+#let rect(body) = rect(width: 2cm, height: 1cm, fill: background, body)
+#rect[Hi!]
 
 // Error: 13 expected body
 #let func(x)
diff --git a/tests/typ/expand.typ b/tests/typ/expand.typ
index 3b2429289..230447443 100644
--- a/tests/typ/expand.typ
+++ b/tests/typ/expand.typ
@@ -6,9 +6,9 @@
 
 // Top-level paragraph fills page, boxed paragraph only when width is fixed.
 L #right[R] \
-#box(width: 50pt)[L #right[R]] \
-#box[L #right[R]] \
+#rect(width: 50pt)[L #right[R]] \
+#rect[L #right[R]] \
 
 // Pad inherits expansion behaviour.
 #pad[PL #right[PR]] \
-#box(pad[PL #right[PR]])
+#rect(pad[PL #right[PR]])
diff --git a/tests/typ/expr/ops-invalid.typ b/tests/typ/expr/ops-invalid.typ
index f760ae312..12d2a2c30 100644
--- a/tests/typ/expr/ops-invalid.typ
+++ b/tests/typ/expr/ops-invalid.typ
@@ -50,10 +50,10 @@
 // Error: 3-4 unknown variable
 { z = 1 }
 
-// Error: 3-6 cannot assign to a constant
-{ box = "hi" }
+// Error: 3-7 cannot assign to a constant
+{ rect = "hi" }
 
-// Works if we define box beforehand
+// Works if we define rect beforehand
 // (since then it doesn't resolve to the standard library version anymore).
-#let box = ""
-{ box = "hi" }
+#let rect = ""
+{ rect = "hi" }
diff --git a/tests/typ/full/coma.typ b/tests/typ/full/coma.typ
index d324627f3..243c667f9 100644
--- a/tests/typ/full/coma.typ
+++ b/tests/typ/full/coma.typ
@@ -10,10 +10,10 @@
 #let university = [*Technische Universität {city}*]
 #let faculty = [*Fakultät II, Institut for Mathematik*]
 
-// The `box` function just places content into a rectangular container. When
+// The `rect` function just places content into a rectangular container. When
 // the only argument to a function is a template, the parentheses can be omitted
 // (i.e. `f[a]` is the same as `f([a])`).
-#box[
+#rect[
     // Backslash adds a forced line break.
     #university \
     #faculty \
@@ -21,7 +21,7 @@
     Dr. Max Mustermann \
     Ola Nordmann, John Doe
 ]
-#align(right, box[*WiSe 2019/2020* \ Woche 3])
+#align(right, rect[*WiSe 2019/2020* \ Woche 3])
 
 // Adds vertical spacing.
 #v(6mm)
diff --git a/tests/typ/library/base.typ b/tests/typ/library/base.typ
index 000a80ea3..29c976c2a 100644
--- a/tests/typ/library/base.typ
+++ b/tests/typ/library/base.typ
@@ -3,7 +3,7 @@
 
 ---
 #test(type("hi"), "string")
-#test(repr([Hi #box[there]]), "[Hi [<node box>]]")
+#test(repr([Hi #rect[there]]), "[Hi [<node box>]]")
 
 ---
 // Check the output.
diff --git a/tests/typ/library/pad.typ b/tests/typ/library/pad.typ
index c8bfe907b..c3d3786ba 100644
--- a/tests/typ/library/pad.typ
+++ b/tests/typ/library/pad.typ
@@ -5,9 +5,9 @@
 #pad(left: 10pt, [Indented!])
 
 // All sides together.
-#box(color: #9feb52,
+#rect(fill: #9feb52,
   pad(10pt, right: 20pt,
-  box(color: #eb5278, width: 20pt, height: 20pt)))
+  rect(width: 20pt, height: 20pt, fill: #eb5278)))
 
-// Error: 13-23 missing argument: body
-Hi #box(pad(left: 10pt)) there
+// Error: 14-24 missing argument: body
+Hi #rect(pad(left: 10pt)) there
diff --git a/tests/typ/library/shapes.typ b/tests/typ/library/shapes.typ
index efb68edfd..c5a8abf95 100644
--- a/tests/typ/library/shapes.typ
+++ b/tests/typ/library/shapes.typ
@@ -1,31 +1,33 @@
 // Test shapes.
 
 ---
+// Test `rect` function.
+
 #page("a8", flip: true)
 
-// Box with fixed width, should have text height.
-#box(width: 2cm, color: #9650D6)[Legal]
+// Fixed width, should have text height.
+#rect(width: 2cm, fill: #9650D6)[Legal]
 
 Sometimes there is no box.
 
-// Box with fixed height, should span line.
-#box(height: 1cm, width: 100%, color: #734CED)[B]
+// Fixed height, should span line.
+#rect(height: 1cm, width: 100%, fill: #734CED)[B]
 
-// Empty box with fixed width and height.
-#box(width: 6cm, height: 12pt, color: #CB4CED)
+// Empty with fixed width and height.
+#rect(width: 6cm, height: 12pt, fill: #CB4CED)
 
 // Not visible, but creates a gap between the boxes above and below.
-#box(width: 2in, color: #ff0000)
+#rect(width: 2in, fill: #ff0000)
 
 // These are in a row!
-#box(width: 0.5in, height: 10pt, color: #D6CD67)
-#box(width: 0.5in, height: 10pt, color: #EDD466)
-#box(width: 0.5in, height: 10pt, color: #E3BE62)
+#rect(width: 0.5in, height: 10pt, fill: #D6CD67)
+#rect(width: 0.5in, height: 10pt, fill: #EDD466)
+#rect(width: 0.5in, height: 10pt, fill: #E3BE62)
 
 ---
-// Make sure that you can't do page related stuff in a box.
+// Make sure that you can't do page related stuff in a shape.
 A
-#box[
+#rect[
     B
     // Error: 16 cannot modify page from here
     #pagebreak()
diff --git a/tests/typ/markup/emph.typ b/tests/typ/markup/emph.typ
index 772e15abf..500381c12 100644
--- a/tests/typ/markup/emph.typ
+++ b/tests/typ/markup/emph.typ
@@ -8,7 +8,7 @@ _Emphasized!_
 Partly em_phas_ized.
 
 // Scoped to body.
-#box[_Scoped] to body.
+#rect[_Scoped] to body.
 
 // Unterminated is fine.
 _The End
diff --git a/tests/typ/markup/heading.typ b/tests/typ/markup/heading.typ
index 8497ec8f7..15c391d1b 100644
--- a/tests/typ/markup/heading.typ
+++ b/tests/typ/markup/heading.typ
@@ -21,7 +21,7 @@
 }
 
 // Function call continues heading.
-= #box[
+= #rect[
     A
 ] B
 
@@ -35,7 +35,7 @@ B
 // Parsed as headings if at start of the context.
 /**/ = Ok
 {[== Ok]}
-#box[=== Ok]
+#rect[=== Ok]
 
 // Not at the start of the context.
 No = heading
diff --git a/tests/typ/markup/strong.typ b/tests/typ/markup/strong.typ
index b02a55a5c..a56e0e1cf 100644
--- a/tests/typ/markup/strong.typ
+++ b/tests/typ/markup/strong.typ
@@ -8,7 +8,7 @@
 Partly str*ength*ened.
 
 // Scoped to body.
-#box[*Scoped] to body.
+#rect[*Scoped] to body.
 
 // Unterminated is fine.
 *The End
diff --git a/tests/typ/repr.typ b/tests/typ/repr.typ
index 96eb710ef..cf137745c 100644
--- a/tests/typ/repr.typ
+++ b/tests/typ/repr.typ
@@ -52,6 +52,6 @@
 // Functions
 #let f(x) = x
 
-{box} \
+{rect} \
 {f} \
 {() => none} \