diff --git a/R/assert_set.R b/R/assert_set.R
index 57f751b..528e01b 100644
--- a/R/assert_set.R
+++ b/R/assert_set.R
@@ -16,7 +16,7 @@
 assert_subset <- assert_create(
   func = is_subset,
   default_error_msg = c(
-    x = "'{.strong {arg_name}}' {cli::qty(length(setopts_exlusive_to_first(arg_value, y)))} contain{?s} {?an/} invalid value{?s}: {.strong {setopts_exlusive_to_first(arg_value, y)}}. Valid values include: {unique(y)}"
+    x = "'{.strong {arg_name}}' {cli::qty(length(setopts_exlusive_to_first(arg_value, y)))} contains {?an/} invalid value{?s}: {.strong {setopts_exlusive_to_first(arg_value, y)}}. Valid values include: {unique(y)}"
   )
 )
 
diff --git a/README.Rmd b/README.Rmd
index 168ef5c..ef2010e 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -23,7 +23,6 @@ knitr::opts_chunk$set(
 [![Closed issues](https://img.shields.io/github/issues-closed/selkamand/assertions.svg)](https://github.com/selkamand/assertions/issues?q=is%3Aissue+is%3Aclosed)
 [![](http://cranlogs.r-pkg.org/badges/last-month/assertions)](https://cran.r-project.org/package=assertions)
 [![](http://cranlogs.r-pkg.org/badges/grand-total/assertions)](https://cran.r-project.org/package=assertions)
-[![Codecov test coverage](https://codecov.io/gh/selkamand/assertions/graph/badge.svg)](https://app.codecov.io/gh/selkamand/assertions)
 
 <!-- badges: end -->
 
@@ -52,11 +51,13 @@ install.packages("assertions")
 
 ### Development version
 
-To get a bug fix or to use a feature from the development version, you can install the development version of assertions from GitHub.
+You can install the development version of assertions from GitHub by running:
 
 ``` r
-# install.packages('remotes')
-remotes::install_github('selkamand/assertions')
+if (!require("remotes", quietly = TRUE))
+    install.packages("remotes")
+
+remotes::install_github("selkamand/assertions")
 ```
 
 ## Quick Start
diff --git a/README.md b/README.md
index 8f9408d..6a83880 100644
--- a/README.md
+++ b/README.md
@@ -7,8 +7,6 @@
 
 [![Lifecycle:
 experimental](https://img.shields.io/badge/lifecycle-experimental-orange.svg)](https://lifecycle.r-lib.org/articles/stages.html#experimental)
-[![Codecov test
-coverage](https://codecov.io/gh/selkamand/assertions/branch/main/graph/badge.svg)](https://app.codecov.io/gh/selkamand/assertions?branch=main)
 [![R-CMD-check](https://github.com/selkamand/assertions/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/selkamand/assertions/actions/workflows/R-CMD-check.yaml)
 [![](https://img.shields.io/github/languages/code-size/selkamand/assertions.svg)](https://github.com/selkamand/assertions)
 [![](https://img.shields.io/github/last-commit/selkamand/assertions.svg)](https://github.com/selkamand/assertions/commits/main)
@@ -16,9 +14,7 @@ coverage](https://codecov.io/gh/selkamand/assertions/branch/main/graph/badge.svg
 issues](https://img.shields.io/github/issues-closed/selkamand/assertions.svg)](https://github.com/selkamand/assertions/issues?q=is%3Aissue+is%3Aclosed)
 [![](http://cranlogs.r-pkg.org/badges/last-month/assertions)](https://cran.r-project.org/package=assertions)
 [![](http://cranlogs.r-pkg.org/badges/grand-total/assertions)](https://cran.r-project.org/package=assertions)
-[![Codecov test
-coverage](https://codecov.io/gh/selkamand/assertions/graph/badge.svg)](https://app.codecov.io/gh/selkamand/assertions)
-[![R-CMD-check](https://github.com/selkamand/assertions/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/selkamand/assertions/actions/workflows/R-CMD-check.yaml)
+
 <!-- badges: end -->
 
 Simple assertions with sensible defaults and customisable error
@@ -49,12 +45,14 @@ install.packages("assertions")
 
 ### Development version
 
-To get a bug fix or to use a feature from the development version, you
-can install the development version of assertions from GitHub.
+You can install the development version of assertions from GitHub by
+running:
 
 ``` r
-# install.packages('remotes')
-remotes::install_github('selkamand/assertions')
+if (!require("remotes", quietly = TRUE))
+    install.packages("remotes")
+
+remotes::install_github("selkamand/assertions")
 ```
 
 ## Quick Start
diff --git a/tests/testthat/_snaps/assert_set.md b/tests/testthat/_snaps/assert_set.md
index 5451e07..a30615d 100644
--- a/tests/testthat/_snaps/assert_set.md
+++ b/tests/testthat/_snaps/assert_set.md
@@ -28,7 +28,7 @@
       assert_subset("def", "abc")
     Condition
       Error:
-      x '"def"' contain an invalid value: def. Valid values include: abc
+      x '"def"' contains an invalid value: def. Valid values include: abc
 
 ---
 
@@ -36,7 +36,7 @@
       assert_subset(c("A"), c(1, 2, 3))
     Condition
       Error:
-      x 'c("A")' contain an invalid value: A. Valid values include: 1, 2, and 3
+      x 'c("A")' contains an invalid value: A. Valid values include: 1, 2, and 3
 
 # assert_one_of() works [plain]