diff --git a/src/ona/io.zig b/src/ona/io.zig
index de8627b..159be80 100644
--- a/src/ona/io.zig
+++ b/src/ona/io.zig
@@ -135,7 +135,7 @@ pub fn Spliterator(comptime Element: type) type {
     };
 }
 
-test {
+test "Spliteration" {
     const testing = std.testing;
 
     // Single-character delimiter.
@@ -286,20 +286,6 @@ pub const Writer = struct {
     }
 };
 
-///
-/// Searches the slice of `Data` referenced by `data` for the first instance of `sought_datum`,
-/// returning its index or `null` if it could not be found.
-///
-pub fn findFirst(comptime Data: type, data: []const Data, sought_datum: Data) ?usize {
-    for (data) |datum, index| if (datum == sought_datum) return index;
-
-    return null;
-}
-
-test {
-    try std.testing.expectEqual(findFirst(u8, "1234567890", '7'), 6);
-}
-
 ///
 /// Writer that silently throws consumed data away and never fails.
 ///
@@ -316,7 +302,7 @@ pub const null_writer = Writer{
     }.write,
 };
 
-test {
+test "Null writing" {
     const testing = std.testing;
 
     {
diff --git a/src/ona/stack.zig b/src/ona/stack.zig
index 4f82925..9ebf9bc 100755
--- a/src/ona/stack.zig
+++ b/src/ona/stack.zig
@@ -91,7 +91,7 @@ pub fn Fixed(comptime Element: type) type {
 ///
 pub const PushError = std.mem.Allocator.Error;
 
-test {
+test "Fixed stack manipulation" {
     const testing = std.testing;
     var buffer = std.mem.zeroes([4]u8);
     var stack = Fixed(u8){.buffer = &buffer};
diff --git a/src/ona/table.zig b/src/ona/table.zig
index 5bdaa81..d42580d 100644
--- a/src/ona/table.zig
+++ b/src/ona/table.zig
@@ -198,3 +198,17 @@ pub const string_context = KeyContext([]const u8){
     .hash = hashString,
     .equals = equalsString,
 };
+
+test "Hashed table manipulation with string context" {
+    const testing = std.testing;
+    var table = try Hashed([]const u8, u32, string_context).init(testing.allocator);
+
+    defer table.deinit();
+
+    const foo = @as(u32, 69);
+
+    testing.expectEqual(table.remove("foo"), null);
+    try table.insert("foo", foo);
+    testing.expectEqual(table.remove("foo"), foo);
+    testing.expectEqual(table.remove("foo"), null);
+}