diff --git a/spec/match-capturing-group.spec.js b/spec/match-capturing-group.spec.js
index 5c31de1..90a0101 100644
--- a/spec/match-capturing-group.spec.js
+++ b/spec/match-capturing-group.spec.js
@@ -6,17 +6,16 @@ beforeEach(() => {
 });
 
 // TODO: Add me
+// describe('CapturingGroup', () => {
+//   describe('named', () => {
+//     it('should', () => {
+//       expect('').toExactlyMatch(r``);
+//     });
+//   });
 
-describe('CapturingGroup', () => {
-  describe('named', () => {
-    it('should', () => {
-      expect('').toExactlyMatch(r``);
-    });
-  });
-
-  describe('numbered', () => {
-    it('should', () => {
-      expect('').toExactlyMatch(r``);
-    });
-  });
-});
+//   describe('numbered', () => {
+//     it('should', () => {
+//       expect('').toExactlyMatch(r``);
+//     });
+//   });
+// });
diff --git a/spec/match-char-class-intersection.spec.js b/spec/match-char-class-intersection.spec.js
index 9ceedfe..5e432a8 100644
--- a/spec/match-char-class-intersection.spec.js
+++ b/spec/match-char-class-intersection.spec.js
@@ -6,10 +6,8 @@ beforeEach(() => {
 });
 
 // TODO: Add me
-// TODO: Test that it throws for target ES2018
-
-describe('CharacterClassIntersection', () => {
-  it('should', () => {
-    expect('').toExactlyMatch(r``);
-  });
-});
+// describe('CharacterClassIntersection', () => {
+//   it('should', () => {
+//     expect('').toExactlyMatch(r``);
+//   });
+// });
diff --git a/spec/match-char-class.spec.js b/spec/match-char-class.spec.js
index 95d237a..7c0cac7 100644
--- a/spec/match-char-class.spec.js
+++ b/spec/match-char-class.spec.js
@@ -6,7 +6,7 @@ beforeEach(() => {
 });
 
 describe('CharacterClass', () => {
-  // TODO: Move to `match-char.spec.js`?
+  // TODO: Move and mix into `match-char.spec.js`?
   describe('Character', () => {
     describe('escape', () => {
       it('should match supported letter escapes', () => {
diff --git a/spec/match-directive.spec.js b/spec/match-directive.spec.js
index da5efa2..d66bc8b 100644
--- a/spec/match-directive.spec.js
+++ b/spec/match-directive.spec.js
@@ -6,17 +6,16 @@ beforeEach(() => {
 });
 
 // TODO: Add me
+// describe('Directive', () => {
+//   describe('flags', () => {
+//     it('should', () => {
+//       expect('').toExactlyMatch(r``);
+//     });
+//   });
 
-describe('Directive', () => {
-  describe('flags', () => {
-    it('should', () => {
-      expect('').toExactlyMatch(r``);
-    });
-  });
-
-  describe('keep', () => {
-    it('should', () => {
-      expect('').toExactlyMatch(r``);
-    });
-  });
-});
+//   describe('keep', () => {
+//     it('should', () => {
+//       expect('').toExactlyMatch(r``);
+//     });
+//   });
+// });
diff --git a/spec/match-flags.spec.js b/spec/match-flags.spec.js
index 85982ad..e7aa7d4 100644
--- a/spec/match-flags.spec.js
+++ b/spec/match-flags.spec.js
@@ -6,9 +6,8 @@ beforeEach(() => {
 });
 
 // TODO: Add me
-
-describe('Flags', () => {
-  it('should', () => {
-    expect('').toExactlyMatch(r``);
-  });
-});
+// describe('Flags', () => {
+//   it('should', () => {
+//     expect('').toExactlyMatch(r``);
+//   });
+// });
diff --git a/spec/match-group.spec.js b/spec/match-group.spec.js
index d1d6529..1f7d24f 100644
--- a/spec/match-group.spec.js
+++ b/spec/match-group.spec.js
@@ -6,23 +6,22 @@ beforeEach(() => {
 });
 
 // TODO: Add me
+// describe('Group', () => {
+//   describe('atomic', () => {
+//     it('should', () => {
+//       expect('').toExactlyMatch(r``);
+//     });
+//   });
 
-describe('Group', () => {
-  describe('atomic', () => {
-    it('should', () => {
-      expect('').toExactlyMatch(r``);
-    });
-  });
+//   describe('flags', () => {
+//     it('should', () => {
+//       expect('').toExactlyMatch(r``);
+//     });
+//   });
 
-  describe('flags', () => {
-    it('should', () => {
-      expect('').toExactlyMatch(r``);
-    });
-  });
-
-  describe('noncapturing', () => {
-    it('should', () => {
-      expect('').toExactlyMatch(r``);
-    });
-  });
-});
+//   describe('noncapturing', () => {
+//     it('should', () => {
+//       expect('').toExactlyMatch(r``);
+//     });
+//   });
+// });
diff --git a/spec/match-quantifier.spec.js b/spec/match-quantifier.spec.js
index d04acf6..20c3926 100644
--- a/spec/match-quantifier.spec.js
+++ b/spec/match-quantifier.spec.js
@@ -7,26 +7,26 @@ beforeEach(() => {
 });
 
 describe('Quantifier', () => {
-  describe('greedy', () => {
-    // TODO: Add me
-    it('should', () => {
-      expect('').toExactlyMatch(r``);
-    });
-  });
+  // TODO: Add me
+  // describe('greedy', () => {
+  //   it('should', () => {
+  //     expect('').toExactlyMatch(r``);
+  //   });
+  // });
 
-  describe('lazy', () => {
-    // TODO: Add me
-    it('should', () => {
-      expect('').toExactlyMatch(r``);
-    });
-  });
+  // TODO: Add me
+  // describe('lazy', () => {
+  //   it('should', () => {
+  //     expect('').toExactlyMatch(r``);
+  //   });
+  // });
 
-  describe('possessive', () => {
-    // TODO: Add me
-    it('should', () => {
-      expect('').toExactlyMatch(r``);
-    });
-  });
+  // TODO: Add me
+  // describe('possessive', () => {
+  //   it('should', () => {
+  //     expect('').toExactlyMatch(r``);
+  //   });
+  // });
 
   describe('quantifiability', () => {
     it('should throw at start of pattern, group, or alternative', () => {
@@ -56,6 +56,7 @@ describe('Quantifier', () => {
       expect(() => toDetails(r`\K+`)).toThrow();
       expect(() => toDetails(r`(?i)+`)).toThrow();
       expect(() => toDetails(r`(?-i)+`)).toThrow();
+      expect(() => toDetails(r`(?i-m)+`)).toThrow();
     });
   });
 });
diff --git a/src/tokenize.js b/src/tokenize.js
index b396edb..822ae67 100644
--- a/src/tokenize.js
+++ b/src/tokenize.js
@@ -66,8 +66,8 @@ const hexCharPattern = r`u(?:\p{AHex}{4})? | x\{[^\}]*\}? | x\p{AHex}{0,2}`;
 const escapedNumPattern = r`\d{1,3}`;
 const charClassOpenPattern = r`\[\^?\]?`;
 // Even with flag x, Onig doesn't allow whitespace to separate a quantifier from the `?` or `+`
-// that makes it lazy or possessive
-const quantifierRe = /[?*+][?+]?|\{\d+(?:,\d*)?\}\??/;
+// that makes it lazy or possessive. Possessive suffixes don't apply to interval quantifiers
+const quantifierRe = /[?*+][?+]?|\{(?:\d+(?:,\d*)?|,\d+)\}\??/;
 const tokenRe = new RegExp(r`
   \\ (?:
     ${controlCharPattern}
@@ -596,7 +596,7 @@ function createTokenForFlagMod(raw, context) {
 function createTokenForQuantifier(raw) {
   const data = {};
   if (raw[0] === '{') {
-    const {min, max} = /^\{(?<min>\d+)(?:,(?<max>\d*))?/.exec(raw).groups;
+    const {min, max} = /^\{(?<min>\d*)(?:,(?<max>\d*))?/.exec(raw).groups;
     const limit = 100_000;
     if (+min > limit || +max > limit) {
       throw new Error('Quantifier value unsupported in Oniguruma');