diff --git a/README.md b/README.md
index 5c9f0e43..9a0d7e07 100644
--- a/README.md
+++ b/README.md
@@ -42,8 +42,9 @@ This library was built to supply the Application object for the GooFit CUDA/OMP
     * Ini configuration support is basic (long options only, no vector support), is more needed?
 * Evaluate compatibility with [ROOT](https://root.cern.ch)'s TApplication object.
     * Add tests: Add way for subclasses to return remaining options rather than throwing error
-* Chained subcommands are not supported, once a subcommand is given the rest of the options go to that subcommand, rather than allowing multiple subcommands. This is currently intentional behavior, but multiple base level subcommands, like [`Click`](http://click.pocoo.org) supports, might be considered in the future.
-* Support case insensitive set and/or subcommands?
+* Chained subcommands are not tested, once a subcommand is given the rest of the options go to that subcommand, rather than allowing multiple subcommands. This is currently intentional behavior, but multiple base level subcommands, like [`Click`](http://click.pocoo.org) supports, might be considered in the future.
+* Test and refine support for case insensitive set and/or subcommands?
+* Throw error if `ignore_case` causes non-unique matches
 
 See the [changelog](./CHANGELOG.md) or [GitHub releases](https://github.com/henryiii/CLI11/releases) for details.
 
diff --git a/include/CLI/App.hpp b/include/CLI/App.hpp
index 21c0dcce..c501b7e2 100644
--- a/include/CLI/App.hpp
+++ b/include/CLI/App.hpp
@@ -89,6 +89,7 @@ public:
 
         parsed = false;
         selected_subcommands.clear();
+        missing.clear();
 
         for(const Option_p &opt : options) {
             opt->clear();
diff --git a/tests/HelpersTest.cpp b/tests/HelpersTest.cpp
index eba88c18..66048dea 100644
--- a/tests/HelpersTest.cpp
+++ b/tests/HelpersTest.cpp
@@ -162,7 +162,7 @@ TEST(RegEx, Longs) {
 
 }
 
-TEST(Regex, SplittingNew) {
+TEST(RegEx, SplittingNew) {
 
     std::vector<std::string> shorts;
     std::vector<std::string> longs;
@@ -183,3 +183,8 @@ TEST(Regex, SplittingNew) {
     EXPECT_THROW(std::tie(shorts, longs, pname) = CLI::detail::get_names({"one","two"}), CLI::BadNameString);
 
 }
+
+TEST(String, ToLower) {
+
+    EXPECT_EQ("one and two", CLI::detail::to_lower("one And TWO"));
+}
diff --git a/tests/SubcommandTest.cpp b/tests/SubcommandTest.cpp
index 632b9c2c..4756619e 100644
--- a/tests/SubcommandTest.cpp
+++ b/tests/SubcommandTest.cpp
@@ -98,4 +98,22 @@ TEST_F(SubcommandProgram, SpareSub) {
     EXPECT_THROW(run(), CLI::ExtrasError);
 }
 
+TEST_F(SubcommandProgram, CaseCheck) {
+    args = {"Start"};
+    EXPECT_THROW(run(), CLI::ExtrasError);
+
+
+    app.reset();
+    args = {"start"};
+    EXPECT_NO_THROW(run());
+
+
+    app.reset();
+    start->ignore_case();
+    EXPECT_NO_THROW(run());
+
+    app.reset();
+    args = {"Start"};
+    EXPECT_NO_THROW(run());
+}