diff --git a/DESCRIPTION b/DESCRIPTION
index 76e4473..f6e98c2 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -34,6 +34,7 @@ Suggests:
     knitr,
     microbenchmark,
     quarto,
+    ripserr,
     TDA,
     tdaunif,
     tinysnapshot,
@@ -45,4 +46,4 @@ VignetteBuilder:
 Encoding: UTF-8
 LazyData: true
 Roxygen: list(markdown = TRUE)
-RoxygenNote: 7.3.2
+RoxygenNote: 7.3.3
diff --git a/inst/tinytest/test-persistence.R b/inst/tinytest/test-persistence.R
new file mode 100644
index 0000000..9b0efa2
--- /dev/null
+++ b/inst/tinytest/test-persistence.R
@@ -0,0 +1,138 @@
+mat <- matrix(c(0, 1, 2, 1, 0.5, 2, 2, 1, 3), ncol = 3, byrow = TRUE)
+colnames(mat) <- c("dimension", "birth", "death")
+pd <- as_persistence(mat)
+df <- data.frame(
+  dimension = c(1, 1, 1, 1, 1),
+  birth = c(1, .6, 1.3, 2.1, 1.99),
+  death = c(2, 1.2, .7, 4.2, 1.99)
+)
+
+
+#as_persistence.default correctly processes a basic matrix"
+expect_inherits(pd, "persistence")
+expect_equal(length(pd$pairs), 3)  # 3 unique degrees (0,1,2)
+expect_equal(unname(pd$pairs[[1]]), matrix(c(1, 2), ncol = 2), ignore_attr = TRUE) # Degree 0
+expect_equal(unname(pd$pairs[[2]]), matrix(c(0.5, 2), ncol = 2), ignore_attr = TRUE) # Degree 1
+expect_equal(unname(pd$pairs[[3]]), matrix(c(1, 3), ncol = 2), ignore_attr = TRUE)  # Degree 2 
+
+#correctly processes output from `____$diag` from the {TDA} package
+coords <- df[, c("birth", "death")]
+
+df3d <- t(data.frame(
+  w = c(1.1, -.2, 1.07),
+  x = c(1.3, 2.1, 1.99),
+  y = c(0.7, 4.2, 1.99),
+  z = c(0.2, 0.4, 0.35)
+))
+
+pd <- TDA::alphaComplexDiag(df3d, maxdimension = 1)$diagram
+pd[, c(2, 3)] <- sqrt(pd[, c(2, 3)])
+pd_p <- as_persistence(pd)
+
+expect_inherits(pd_p, "persistence")
+expect_equal(pd_p$metadata$parameters$maxdimension, 1)
+expect_equal(length(pd_p$pairs[[1]][1, ]), 2) #correct Format
+
+
+pd2 <- TDA::alphaShapeDiag(df3d, maxdimension = 2)$diagram
+pd2[, c(2, 3)] <- sqrt(pd2[, c(2, 3)])
+pd_p2 <- as_persistence(pd2)
+
+expect_inherits(pd_p2, "persistence")
+expect_equal(pd_p$metadata$parameters$maxdimension, 1)
+expect_equal(length(pd_p2$pairs[[1]][1, ]), 2) #correct Format
+
+
+FltRips <- TDA::ripsFiltration(X = df, maxdimension = 1,
+                          maxscale = 1.5, dist = "euclidean", library = "Dionysus",
+                          printProgress = FALSE)
+DiagFltRips <- TDA::filtrationDiag(filtration = FltRips, maxdimension = 1,
+                              library = "Dionysus", location = TRUE, printProgress = FALSE)
+pd3 <- DiagFltRips$diagram
+pd3[, c(2, 3)] <- sqrt(pd3[, c(2, 3)])
+pd_p3 <- as_persistence(pd3)
+
+expect_inherits(pd_p3, "persistence")
+expect_equal(pd_p3$metadata$parameters$maxdimension, 1)
+expect_equal(length(pd_p3$pairs[[1]][1, ]), 2) #correct Format
+
+
+Diag1 <- TDA::gridDiag(coords, TDA::distFct, lim = cbind(c(-1, 1), c(-1, 1)), maxdimension = 1 ,by = 0.05, sublevel = TRUE,
+                    printProgress = FALSE) 
+pd4 <- Diag1$diagram 
+pd4[, c(2, 3)] <- sqrt(pd4[, c(2, 3)])
+pd_p4 <- as_persistence(pd4)
+  
+expect_inherits(pd_p4, "persistence")
+expect_equal(pd_p4$metadata$parameters$maxdimension, 1)
+expect_equal(length(pd_p4$pairs[[1]][1, ]), 2) #correct Format
+
+
+pd5 <- TDA::ripsDiag(df, maxdimension = 1, maxscale = 10)$diagram
+pd5[, c(2, 3)] <- sqrt(pd5[, c(2, 3)])
+pd_p5 <- as_persistence(pd5)
+  
+expect_inherits(pd_p5, "persistence")
+expect_equal(length(pd_p5$pairs), 1)
+expect_equal(length(pd_p5$pairs[[1]][1, ]), 2) #correct Format
+
+
+#as_persistence.PHom correctly processes output from `ripserr::cubical` from {ripserr}
+pd <- ripserr::cubical(volcano)
+pd_p <- as_persistence(pd)
+
+rip_ver <- as.character(utils::packageVersion("ripserr"))
+
+if (utils::compareVersion(rip_ver, "0.3.0") >= 0) {
+  #ripserr ≥ 0.3.0
+  expect_inherits(pd_p, "persistence")
+  expect_equal(pd_p$metadata$engine, "ripserr::<vietoris_rips/cubical>")
+  expect_equal(pd_p$metadata$filtration, "Vietoris-Rips/cubical")
+  expect_equal(length(pd_p$pairs[[1]][1, ]), 2)
+} else {
+  #ripserr < 0.3.0
+  expect_inherits(pd_p, "persistence")
+  expect_equal(pd_p$metadata$engine, "ripserr::<vietoris_rips/cubical>")
+  expect_equal(pd_p$metadata$filtration, "Vietoris-Rips/cubical")
+  expect_equal(length(pd_p$pairs[[1]][1, ]), 2)
+}
+
+
+#as_persistence.list handles a list of matrices correctly"
+pd <- as_persistence(list(matrix(c(1, 2), ncol = 2), matrix(c(0.5, 2), ncol = 2)))
+  
+expect_inherits(pd, "persistence")
+expect_equal(length(pd$pairs), 2)  #Two degrees (0 and 1)
+expect_equal(pd$pairs[[1]], matrix(c(1, 2), ncol = 2))
+expect_equal(pd$pairs[[2]], matrix(c(0.5, 2), ncol = 2))
+
+
+
+#as_persistence.persistence returns the object unchanged
+mat <- matrix(c(0, 1, 2, 1, 0.5, 2), ncol = 3, byrow = TRUE)
+colnames(mat) <- c("dimension", "birth", "death")
+pd <- as_persistence(mat)
+pd2 <- as_persistence(pd)
+  
+expect_identical(pd, pd2)
+
+
+
+#as.data.frame.persistence creates correct format
+mat <- matrix(c(0, 1, 2, 1, 0.5, 2), ncol = 3, byrow = TRUE)
+colnames(mat) <- c("dimension", "birth", "death")
+pd <- as_persistence(mat)
+df <- as.data.frame(pd)
+ 
+expect_inherits(df, "data.frame")
+expect_equal(colnames(df), c("dimension", "birth", "death"))
+expect_equal(as.numeric(df[1, ]), c(0, 1, 2))
+
+
+#`get_pairs` correctly grabs pairs from persistence object
+
+pd_p <- as_persistence(pd)
+expect_equal(get_pairs(pd_p, 1), pd_p$pairs[[2]])
+expect_true(all(is.na(get_pairs(pd_p, 3)))) #nonexistent dimension returns empty matrix
+expect_error(get_pairs(pd)) #verifies failure given incorrect class
+