diff --git a/tests/testthat/test-smk-mdPatternDS.R b/tests/testthat/test-smk-mdPatternDS.R
index 33e65055..f00feb84 100644
--- a/tests/testthat/test-smk-mdPatternDS.R
+++ b/tests/testthat/test-smk-mdPatternDS.R
@@ -18,14 +18,80 @@ context("mdPatternDS::smk::setup")
 # Tests
 #
 
-context("mdPatternDS::smk::sample data.frame")
-test_that("mdPatternDS: sample data.frame", {
+context("mdPatternDS::smk::sample complete data.frame")
+test_that("mdPatternDS: sample complete data.frame", {
     x_val <- data.frame(v1 = c(0.0, 1.0, 2.0, 3.0, 4.0), v2 = c(4.0, 3.0, 2.0, 1.0, 0.0))
     x     <- "x_val"
 
     res <- mdPatternDS(x)
 
     expect_length(res, 3)
+    expect_length(class(res), 1)
+    expect_true(all(class(res) %in% c("list")))
+    expect_length(class(res$pattern), 2)
+    expect_true(all(class(res$pattern) %in% c("matrix", "array")))
+
+    expect_length(colnames(res$pattern), 3)
+    expect_equal(colnames(res$pattern)[1], "v1")
+    expect_equal(colnames(res$pattern)[2], "v2")
+    expect_equal(colnames(res$pattern)[3], "")
+    expect_length(rownames(res$pattern), 2)
+    expect_equal(rownames(res$pattern)[1], "5")
+    expect_equal(rownames(res$pattern)[2], "")
+
+    expect_equal(res$pattern[1, 1], 1)
+    expect_equal(res$pattern[1, 2], 1)
+    expect_equal(res$pattern[1, 3], 0)
+    expect_equal(res$pattern[2, 1], 0)
+    expect_equal(res$pattern[2, 2], 0)
+    expect_equal(res$pattern[2, 3], 0)
+	
+    expect_length(class(res$valid), 1)
+    expect_true(all(class(res$valid) %in% c("logical")))
+    expect_true(res$valid)
+    expect_length(class(res$message), 1)
+    expect_true(all(class(res$message) %in% c("character")))
+    expect_equal(res$message, "Valid: all pattern counts meet disclosure requirements")
+})
+
+context("mdPatternDS::smk::sample incomplete data.frame")
+test_that("mdPatternDS: sample incomplete data.frame", {
+    x_val <- data.frame(v1 = c(0.0, NA, 2.0, 3.0, 4.0), v2 = c(4.0, 3.0, 2.0, 1.0, 0.0))
+    x     <- "x_val"
+
+    res <- mdPatternDS(x)
+
+    expect_length(res, 3)
+    expect_length(class(res), 1)
+    expect_true(all(class(res) %in% c("list")))
+    expect_length(class(res$pattern), 2)
+    expect_true(all(class(res$pattern) %in% c("matrix", "array")))
+
+    expect_length(colnames(res$pattern), 3)
+    expect_equal(colnames(res$pattern)[1], "v2")
+    expect_equal(colnames(res$pattern)[2], "v1")
+    expect_equal(colnames(res$pattern)[3], "")
+    expect_length(rownames(res$pattern), 3)
+    expect_equal(rownames(res$pattern)[1], "4")
+    expect_equal(rownames(res$pattern)[2], "1")
+    expect_equal(rownames(res$pattern)[3], "")
+
+    expect_equal(res$pattern[1, 1], 1)
+    expect_equal(res$pattern[1, 2], 1)
+    expect_equal(res$pattern[1, 3], 0)
+    expect_equal(res$pattern[2, 1], 1)
+    expect_equal(res$pattern[2, 2], 0)
+    expect_equal(res$pattern[2, 3], 1)
+    expect_equal(res$pattern[3, 1], 0)
+    expect_equal(res$pattern[3, 2], 1)
+    expect_equal(res$pattern[3, 3], 1)
+	
+    expect_length(class(res$valid), 1)
+    expect_true(all(class(res$valid) %in% c("logical")))
+    expect_true(res$valid)
+    expect_length(class(res$message), 1)
+    expect_true(all(class(res$message) %in% c("character")))
+    expect_equal(res$message, "Valid: all pattern counts meet disclosure requirements")
 })
 
 #