diff --git a/inst/tinytest/test-tool.R b/inst/tinytest/test-tool.R
new file mode 100644
index 0000000..d29cfb9
--- /dev/null
+++ b/inst/tinytest/test-tool.R
@@ -0,0 +1,57 @@
+# Test just this file: tinytest::run_test_file("inst/tinytest/test-tool.R")
+
+# Create tool ------------------------------------------------------------------
+tool_name <- "Vaccine"
+
+expect_silent(tool_0 <- tool(
+  name = tool_name,
+  prevalence = 0.5,
+  as_proportion = TRUE,
+  susceptibility_reduction = .9,
+  transmission_reduction = .5,
+  recovery_enhancer = .5,
+  death_reduction = .9
+))
+
+# Check tool initialization
+expect_inherits(tool_0, "epiworld_tool")
+expect_length(class(tool_0), 1)
+
+# Check tool helper functions --------------------------------------------------
+expect_stdout(print(tool_0))
+
+expect_equal(get_name_tool(tool_0), tool_name)
+
+new_tool_name <- "New Vaccine"
+expect_silent(tool_renamed <- set_name_tool(tool_0, new_tool_name))
+expect_equal(get_name_tool(tool_0), new_tool_name)
+expect_equal(get_name_tool(tool_renamed), new_tool_name)
+
+# Check adding tool to model ---------------------------------------------------
+sir_0 <- ModelSIR(name = "COVID-19", prevalence = .01,
+                  transmission_rate = .9, recovery_rate = .3)
+expect_silent(sir_with_tool <- add_tool(sir_0, tool_0))
+expect_inherits(sir_with_tool, "epiworld_model")
+
+# Check adding tool with proportion parameter (deprecated)
+expect_warning(add_tool(sir_0, tool_0, 3), "deprecated")
+
+# Check removing tools
+expect_error(rm_tool(sir_0, 2), "only 2 tools")
+expect_silent(rm_tool(sir_0, 1))
+expect_silent(rm_tool(sir_0, 0))
+expect_error(rm_tool(sir_0, 0), "only 0 tools")
+
+# Check initialization with missing prevalence parameter (deprecated) ----------
+expect_warning(tool_1 <- tool(
+  name = "Vaccine",
+  as_proportion = TRUE,
+  susceptibility_reduction = .9,
+  transmission_reduction = .5,
+  recovery_enhancer = .5,
+  death_reduction = .9
+))
+
+expect_true(attributes(tool_1)$uses_deprecated)
+
+