diff --git a/test/terrain_grassy.c b/test/terrain_grassy.c
index 6b3a93234..77f8a9927 100644
--- a/test/terrain_grassy.c
+++ b/test/terrain_grassy.c
@@ -14,3 +14,6 @@ SINGLE_BATTLE_TEST("Grassy Terrain recovers 1/16th HP at end of turn")
         HP_BAR(player, damage: -maxHP / 16);
     }
 }
+
+TO_DO_BATTLE_TEST("Grassy Terrain increases power of Grass-type moves by 30/50 percent")
+TO_DO_BATTLE_TEST("Grassy Terrain decreases power of Earthquake, Magnitude and Bulldoze by 50 percent")
diff --git a/test/test.h b/test/test.h
index 27475bb48..a05e42a04 100644
--- a/test/test.h
+++ b/test/test.h
@@ -13,6 +13,7 @@ enum TestResult
     TEST_RESULT_INVALID,
     TEST_RESULT_ERROR,
     TEST_RESULT_TIMEOUT,
+    TEST_RESULT_TODO,
 };
 
 struct TestRunner
@@ -138,4 +139,10 @@ s32 MgbaPrintf_(const char *fmt, ...);
 #define KNOWN_FAILING \
     Test_ExpectedResult(TEST_RESULT_FAIL)
 
+#define TO_DO \
+    Test_ExpectedResult(TEST_RESULT_TODO)
+
+#define EXPECT_TO_DO \
+    Test_ExitWithResult(TEST_RESULT_TODO, "%s:%d: EXPECT_TO_DO", gTestRunnerState.test->filename, __LINE__)
+
 #endif
diff --git a/test/test_battle.h b/test/test_battle.h
index 16918251b..1e97229bd 100644
--- a/test/test_battle.h
+++ b/test/test_battle.h
@@ -601,6 +601,15 @@ extern struct BattleTestRunnerState *gBattleTestRunnerState;
 
 /* Test */
 
+#define TO_DO_BATTLE_TEST(_name) \
+    SINGLE_BATTLE_TEST("TODO: " _name) \
+    { \
+        TO_DO; \
+        GIVEN { PLAYER(SPECIES_WOBBUFFET); OPPONENT(SPECIES_WOBBUFFET); } \
+        WHEN { TURN { } } \
+        THEN { EXPECT_TO_DO; } \
+    }
+
 #define SINGLE_BATTLE_TEST(_name, ...) \
     struct CAT(Result, __LINE__) { MEMBERS(__VA_ARGS__) }; \
     static void CAT(Test, __LINE__)(struct CAT(Result, __LINE__) *, u32, struct BattlePokemon *, struct BattlePokemon *); \
diff --git a/test/test_runner.c b/test/test_runner.c
index f2d4d5de3..1d3f14aad 100644
--- a/test/test_runner.c
+++ b/test/test_runner.c
@@ -193,6 +193,10 @@ void CB2_TestRunner(void)
                 result = "ASSUMPTION_FAIL";
                 color = "\e[33m";
                 break;
+            case TEST_RESULT_TODO:
+                result = "TO_DO";
+                color = "\e[33m";
+                break;
             case TEST_RESULT_INVALID:
                 result = "INVALID";
                 break;
@@ -211,6 +215,8 @@ void CB2_TestRunner(void)
                 MgbaPrintf_(":P%s%s\e[0m", color, result);
             else if (gTestRunnerState.result == TEST_RESULT_ASSUMPTION_FAIL)
                 MgbaPrintf_(":A%s%s\e[0m", color, result);
+            else if (gTestRunnerState.result == TEST_RESULT_TODO)
+                MgbaPrintf_(":T%s%s\e[0m", color, result);
             else if (gTestRunnerState.expectedResult == gTestRunnerState.result)
                 MgbaPrintf_(":K%s%s\e[0m", color, result);
             else
diff --git a/tools/mgba-rom-test-hydra/main.c b/tools/mgba-rom-test-hydra/main.c
index f506d0428..8705225b8 100644
--- a/tools/mgba-rom-test-hydra/main.c
+++ b/tools/mgba-rom-test-hydra/main.c
@@ -44,6 +44,7 @@ struct Runner
     char *output_buffer;
     int passes;
     int knownFails;
+    int todos;
     int assumptionFails;
     int fails;
     int results;
@@ -87,6 +88,9 @@ static void handle_read(struct Runner *runner)
                 case 'K':
                     runner->knownFails++;
                     goto add_to_results;
+                case 'T':
+                    runner->todos++;
+                    goto add_to_results;
                 case 'A':
                     runner->assumptionFails++;
                     goto add_to_results;
@@ -427,6 +431,7 @@ int main(int argc, char *argv[])
     int exit_code = 0;
     int passes = 0;
     int knownFails = 0;
+    int todos = 0;
     int assumptionFails = 0;
     int fails = 0;
     int results = 0;
@@ -444,6 +449,7 @@ int main(int argc, char *argv[])
             exit_code = WEXITSTATUS(wstatus);
         passes += runners[i].passes;
         knownFails += runners[i].knownFails;
+        todos += runners[i].todos;
         assumptionFails += runners[i].assumptionFails;
         fails += runners[i].fails;
         results += runners[i].results;
@@ -459,6 +465,8 @@ int main(int argc, char *argv[])
         fprintf(stdout, "- Tests \e[32mPASSED\e[0m:        %d\n", passes);
         if (knownFails > 0)
             fprintf(stdout, "- Tests \e[33mKNOWN_FAILING\e[0m: %d\n", knownFails);
+        if (todos > 0)
+            fprintf(stdout, "- Tests \e[33mTO_DO\e[0m:         %d\n", todos);
         if (fails > 0)
             fprintf(stdout, "- Tests \e[31mFAILED\e[0m :       %d\n", fails);
         if (assumptionFails > 0)