diff --git a/DESCRIPTION b/DESCRIPTION
index c7f0798..6e77c00 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -29,7 +29,6 @@ Suggests:
     magrittr,
     rmarkdown,
     tibble,
-    plyr,
     covr
 VignetteBuilder: knitr
 RoxygenNote: 7.2.3
diff --git a/codemeta.json b/codemeta.json
index bcf8447..631cb28 100644
--- a/codemeta.json
+++ b/codemeta.json
@@ -97,18 +97,6 @@
         "url": "https://cran.r-project.org"
       },
       "sameAs": "https://CRAN.R-project.org/package=tibble"
-    },
-    {
-      "@type": "SoftwareApplication",
-      "identifier": "plyr",
-      "name": "plyr",
-      "provider": {
-        "@id": "https://cran.r-project.org",
-        "@type": "Organization",
-        "name": "Comprehensive R Archive Network (CRAN)",
-        "url": "https://cran.r-project.org"
-      },
-      "sameAs": "https://CRAN.R-project.org/package=plyr"
     }
   ],
   "softwareRequirements": {
diff --git a/tests/testthat/test-assertions.R b/tests/testthat/test-assertions.R
index c00b812..376e67a 100644
--- a/tests/testthat/test-assertions.R
+++ b/tests/testthat/test-assertions.R
@@ -1610,6 +1610,6 @@ test_that("handle predicates applied to the whole data, and not to subframe", {
     head( n = 0)
 
   expect_silent({
-    assert(data = a_tibble, predicate = plyr::empty, dplyr::everything())
+    assert(data = a_tibble, predicate = function(x) nrow(x) == 0L, dplyr::everything())
   })
 })