diff --git a/tests/testthat/test-spdep.R b/tests/testthat/test-spdep.R
new file mode 100644
index 000000000..1652ce27b
--- /dev/null
+++ b/tests/testthat/test-spdep.R
@@ -0,0 +1,71 @@
+context("spdep")
+
+skip_if_not_installed("modeltests")
+library(modeltests)
+
+skip_if_not_installed("spdep")
+library(spdep)
+
+skip_if_not_installed("spatialreg")
+library(spatialreg)
+
+data(oldcol, package="spdep")
+listw <- spdep::nb2listw(COL.nb, style="W")
+
+fit_lag <- lagsarlm(CRIME ~ INC + HOVAL, 
+                    data = COL.OLD,  
+                    listw = listw, 
+                    method = "eigen")
+fit_error <- errorsarlm(CRIME ~ INC + HOVAL, 
+                        data = COL.OLD, 
+                        listw)
+
+fit_sac <- sacsarlm(CRIME ~ INC + HOVAL, 
+                    data = COL.OLD, 
+                    listw)
+
+test_that("spdep tidier arguments", {
+  check_arguments(tidy.sarlm)
+  check_arguments(glance.sarlm)
+  check_arguments(augment.sarlm, strict = FALSE)
+})
+
+test_that("tidy.sarlm", {
+  td1 <- tidy(fit_lag)
+  td2 <- tidy(fit_error)
+  td3 <- tidy(fit_sac)
+  td4 <- tidy(fit_sac, conf.int = TRUE)
+  
+  check_tidy_output(td1)
+  check_tidy_output(td2)
+  check_tidy_output(td3)
+  check_tidy_output(td4)
+  
+  check_dims(td1, 4, 5)
+  check_dims(td2, 4, 5)
+  check_dims(td3, 5, 5)
+  check_dims(td4, 5, 7)
+})
+
+
+test_that("glance.sarlm", {
+  gl1 <- glance(fit_lag)
+  gl2 <- glance(fit_error)
+  gl3 <- glance(fit_sac)
+  
+  check_glance_outputs(gl1, gl2, gl3)
+  
+  check_dims(gl1, 1, 6)
+  check_dims(gl2, 1, 6)
+  check_dims(gl3, 1, 6)
+})
+
+test_that("augment.sarlm", {
+  check_augment_function(
+    aug = augment.sarlm,
+    model = fit_lag,
+    data = fit_lag$X,
+    strict = FALSE
+  )
+})
+