diff --git a/man/ggproto.Rd b/man/ggproto.Rd
index c00c2000f6..11e3af8093 100644
--- a/man/ggproto.Rd
+++ b/man/ggproto.Rd
@@ -3,14 +3,11 @@
 \name{ggproto}
 \alias{ggproto}
 \alias{ggproto_parent}
-\alias{is.ggproto}
 \title{Create a new ggproto object}
 \usage{
 ggproto(`_class` = NULL, `_inherit` = NULL, ...)
 
 ggproto_parent(parent, self)
-
-is.ggproto(x)
 }
 \arguments{
 \item{_class}{Class name to assign to the object. This is stored as the class
@@ -24,8 +21,6 @@ inherit from any object.}
 functions that become methods of the class or regular objects.}
 
 \item{parent, self}{Access parent class \code{parent} of object \code{self}.}
-
-\item{x}{An object to test.}
 }
 \description{
 Construct a new object with \code{ggproto()}, test with \code{is.ggproto()},
diff --git a/man/is.Coord.Rd b/man/is.Coord.Rd
deleted file mode 100644
index 50b4520640..0000000000
--- a/man/is.Coord.Rd
+++ /dev/null
@@ -1,12 +0,0 @@
-% Generated by roxygen2: do not edit by hand
-% Please edit documentation in R/coord-.R
-\name{is.Coord}
-\alias{is.Coord}
-\title{Is this object a coordinate system?}
-\usage{
-is.Coord(x)
-}
-\description{
-Is this object a coordinate system?
-}
-\keyword{internal}
diff --git a/man/is.facet.Rd b/man/is.facet.Rd
deleted file mode 100644
index bd8fc7b5ba..0000000000
--- a/man/is.facet.Rd
+++ /dev/null
@@ -1,15 +0,0 @@
-% Generated by roxygen2: do not edit by hand
-% Please edit documentation in R/facet-.R
-\name{is.facet}
-\alias{is.facet}
-\title{Is this object a faceting specification?}
-\usage{
-is.facet(x)
-}
-\arguments{
-\item{x}{object to test}
-}
-\description{
-Is this object a faceting specification?
-}
-\keyword{internal}
diff --git a/man/is.ggplot.Rd b/man/is.ggplot.Rd
deleted file mode 100644
index 837bc9a919..0000000000
--- a/man/is.ggplot.Rd
+++ /dev/null
@@ -1,15 +0,0 @@
-% Generated by roxygen2: do not edit by hand
-% Please edit documentation in R/plot.R
-\name{is.ggplot}
-\alias{is.ggplot}
-\title{Reports whether x is a ggplot object}
-\usage{
-is.ggplot(x)
-}
-\arguments{
-\item{x}{An object to test}
-}
-\description{
-Reports whether x is a ggplot object
-}
-\keyword{internal}
diff --git a/man/is.theme.Rd b/man/is.theme.Rd
deleted file mode 100644
index c7930a2e96..0000000000
--- a/man/is.theme.Rd
+++ /dev/null
@@ -1,15 +0,0 @@
-% Generated by roxygen2: do not edit by hand
-% Please edit documentation in R/theme.R
-\name{is.theme}
-\alias{is.theme}
-\title{Reports whether x is a theme object}
-\usage{
-is.theme(x)
-}
-\arguments{
-\item{x}{An object to test}
-}
-\description{
-Reports whether x is a theme object
-}
-\keyword{internal}
diff --git a/man/is_tests.Rd b/man/is_tests.Rd
new file mode 100644
index 0000000000..472896fe47
--- /dev/null
+++ b/man/is_tests.Rd
@@ -0,0 +1,64 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/utilities-checks.R
+\name{is_tests}
+\alias{is_tests}
+\alias{is.ggplot}
+\alias{is.mapping}
+\alias{is.coord}
+\alias{is.Coord}
+\alias{is.ggproto}
+\alias{is.facet}
+\alias{is.layer}
+\alias{is.geom}
+\alias{is.stat}
+\alias{is.position}
+\alias{is.scale}
+\alias{is.guide}
+\alias{is.guides}
+\alias{is.theme}
+\alias{is.element}
+\alias{is.margin}
+\title{Reports whether x is a type of object}
+\usage{
+is.ggplot(x)
+
+is.mapping(x)
+
+is.coord(x)
+
+is.Coord(x) # Deprecated
+
+is.ggproto(x)
+
+is.facet(x)
+
+# Layer related tests
+is.layer(x)
+
+is.geom(x)
+
+is.stat(x)
+
+is.position(x)
+
+# Scale and guide related tests
+is.scale(x)
+
+is.guide(x)
+
+is.guides(x)
+
+# Theme related tests
+is.theme(x)
+
+is.element(x)
+
+is.margin(x)
+}
+\arguments{
+\item{x}{An object to test}
+}
+\description{
+Reports whether x is a type of object
+}
+\keyword{internal}